Vulnerability-Lookup

Vulnerability from cleanstart

Published

2026-05-18 13:25

Modified

2026-05-12 13:08

Summary

Security fixes for CVE-2026-32280, CVE-2026-32281, CVE-2026-32282, CVE-2026-32283, CVE-2026-32289, CVE-2026-33810, CVE-2026-33811, CVE-2026-33814, CVE-2026-39817, CVE-2026-39819, CVE-2026-39820, CVE-2026-39823, CVE-2026-39825, CVE-2026-39826, CVE-2026-39836, CVE-2026-42499, CVE-2026-42501 applied in versions: 0.36.1-r0, 0.36.6-r0

Details

Multiple security vulnerabilities affect the sealed-secrets package. These issues are resolved in later releases. See references for individual vulnerability details.

References

URL

Type

	https://github.com/cleanstart-dev/cleanstart-secu…	ADVISORY
	https://osv.dev/vulnerability/CVE-2026-32280	WEB
	https://osv.dev/vulnerability/CVE-2026-32281	WEB
	https://osv.dev/vulnerability/CVE-2026-32282	WEB
	https://osv.dev/vulnerability/CVE-2026-32283	WEB
	https://osv.dev/vulnerability/CVE-2026-32289	WEB
	https://osv.dev/vulnerability/CVE-2026-33810	WEB
	https://osv.dev/vulnerability/CVE-2026-33811	WEB
	https://osv.dev/vulnerability/CVE-2026-33814	WEB
	https://osv.dev/vulnerability/CVE-2026-39817	WEB
	https://osv.dev/vulnerability/CVE-2026-39819	WEB
	https://osv.dev/vulnerability/CVE-2026-39820	WEB
	https://osv.dev/vulnerability/CVE-2026-39823	WEB
	https://osv.dev/vulnerability/CVE-2026-39825	WEB
	https://osv.dev/vulnerability/CVE-2026-39826	WEB
	https://osv.dev/vulnerability/CVE-2026-39836	WEB
	https://osv.dev/vulnerability/CVE-2026-42499	WEB
	https://osv.dev/vulnerability/CVE-2026-42501	WEB
	https://nvd.nist.gov/vuln/detail/CVE-2026-32280	WEB
	https://nvd.nist.gov/vuln/detail/CVE-2026-32281	WEB
	https://nvd.nist.gov/vuln/detail/CVE-2026-32282	WEB
	https://nvd.nist.gov/vuln/detail/CVE-2026-32283	WEB
	https://nvd.nist.gov/vuln/detail/CVE-2026-32289	WEB
	https://nvd.nist.gov/vuln/detail/CVE-2026-33810	WEB
	https://nvd.nist.gov/vuln/detail/CVE-2026-33811	WEB
	https://nvd.nist.gov/vuln/detail/CVE-2026-33814	WEB
	https://nvd.nist.gov/vuln/detail/CVE-2026-39817	WEB
	https://nvd.nist.gov/vuln/detail/CVE-2026-39819	WEB
	https://nvd.nist.gov/vuln/detail/CVE-2026-39820	WEB
	https://nvd.nist.gov/vuln/detail/CVE-2026-39823	WEB
	https://nvd.nist.gov/vuln/detail/CVE-2026-39825	WEB
	https://nvd.nist.gov/vuln/detail/CVE-2026-39826	WEB
	https://nvd.nist.gov/vuln/detail/CVE-2026-39836	WEB
	https://nvd.nist.gov/vuln/detail/CVE-2026-42499	WEB
	https://nvd.nist.gov/vuln/detail/CVE-2026-42501	WEB

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "CleanStart",
        "name": "sealed-secrets"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.36.6-r0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "credits": [],
  "database_specific": {},
  "details": "Multiple security vulnerabilities affect the sealed-secrets package. These issues are resolved in later releases. See references for individual vulnerability details.",
  "id": "CLEANSTART-2026-AY89602",
  "modified": "2026-05-12T13:08:10Z",
  "published": "2026-05-18T13:25:01.893451Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/cleanstart-dev/cleanstart-security-advisories/tree/main/advisories/2026/CLEANSTART-2026-AY89602.json"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2026-32280"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2026-32281"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2026-32282"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2026-32283"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2026-32289"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2026-33810"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2026-33811"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2026-33814"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2026-39817"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2026-39819"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2026-39820"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2026-39823"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2026-39825"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2026-39826"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2026-39836"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2026-42499"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2026-42501"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32280"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32281"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32282"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32283"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32289"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33810"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33811"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33814"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-39817"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-39819"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-39820"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-39823"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-39825"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-39826"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-39836"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42499"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42501"
    }
  ],
  "related": [],
  "schema_version": "1.7.3",
  "summary": "Security fixes for CVE-2026-32280, CVE-2026-32281, CVE-2026-32282, CVE-2026-32283, CVE-2026-32289, CVE-2026-33810, CVE-2026-33811, CVE-2026-33814, CVE-2026-39817, CVE-2026-39819, CVE-2026-39820, CVE-2026-39823, CVE-2026-39825, CVE-2026-39826, CVE-2026-39836, CVE-2026-42499, CVE-2026-42501 applied in versions: 0.36.1-r0, 0.36.6-r0",
  "upstream": [
    "CVE-2026-32280",
    "CVE-2026-32281",
    "CVE-2026-32282",
    "CVE-2026-32283",
    "CVE-2026-32289",
    "CVE-2026-33810",
    "CVE-2026-33811",
    "CVE-2026-33814",
    "CVE-2026-39817",
    "CVE-2026-39819",
    "CVE-2026-39820",
    "CVE-2026-39823",
    "CVE-2026-39825",
    "CVE-2026-39826",
    "CVE-2026-39836",
    "CVE-2026-42499",
    "CVE-2026-42501"
  ]
}

CVE-2026-39820 (GCVE-0-2026-39820)

Vulnerability from cvelistv5 – Published: 2026-05-07 19:41 – Updated: 2026-05-08 14:27

Title

Quadratic string concatentation in consumeComment in net/mail

Summary

Well-crafted inputs reaching ParseAddress, ParseAddressList, and ParseDate were able to trigger excessive CPU exhaustion and memory allocations.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-407 - Inefficient Algorithmic Complexity

Assigner

References

4 references

URL	Tags
https://go.dev/issue/78566
https://go.dev/cl/759940
https://groups.google.com/g/golang-announce/c/qcC…
https://pkg.go.dev/vuln/GO-2026-4986

Impacted products

1 product

Vendor	Product	Version
Go standard library	net/mail	Affected: 0 , < 1.25.10 (semver) Affected: 1.26.0-0 , < 1.26.3 (semver)

Credits

thatnealpatel

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-39820",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-08T14:27:51.595266Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-08T14:27:54.923Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "net/mail",
          "product": "net/mail",
          "programRoutines": [
            {
              "name": "addrParser.consumeComment"
            },
            {
              "name": "AddressParser.Parse"
            },
            {
              "name": "AddressParser.ParseList"
            },
            {
              "name": "Header.AddressList"
            },
            {
              "name": "Header.Date"
            },
            {
              "name": "ParseAddress"
            },
            {
              "name": "ParseAddressList"
            },
            {
              "name": "ParseDate"
            }
          ],
          "vendor": "Go standard library",
          "versions": [
            {
              "lessThan": "1.25.10",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "1.26.3",
              "status": "affected",
              "version": "1.26.0-0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "thatnealpatel"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Well-crafted inputs reaching ParseAddress, ParseAddressList, and ParseDate were able to trigger excessive CPU exhaustion and memory allocations."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-407: Inefficient Algorithmic Complexity",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-07T19:41:19.854Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/issue/78566"
        },
        {
          "url": "https://go.dev/cl/759940"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/qcCIEXso47M"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-4986"
        }
      ],
      "title": "Quadratic string concatentation in consumeComment in net/mail"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2026-39820",
    "datePublished": "2026-05-07T19:41:19.854Z",
    "dateReserved": "2026-04-07T18:13:03.526Z",
    "dateUpdated": "2026-05-08T14:27:54.923Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-39823 (GCVE-0-2026-39823)

Vulnerability from cvelistv5 – Published: 2026-05-07 19:41 – Updated: 2026-05-08 14:05

Title

Bypass of meta content URL escaping causes XSS in html/template

Summary

CVE-2026-27142 fixed a vulnerability in which URLs were not correctly escaped inside of a <meta> tag's <content> attribute. If the URL content were to insert ASCII whitespaces around the '=' rune inside of the <content> attribute, the escaper would fail to similarly escape it, leading to XSS.

Severity ?

6.1 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

References

4 references

URL	Tags
https://go.dev/issue/78913
https://go.dev/cl/769920
https://groups.google.com/g/golang-announce/c/qcC…
https://pkg.go.dev/vuln/GO-2026-4982

Impacted products

1 product

Vendor	Product	Version
Go standard library	html/template	Affected: 0 , < 1.25.10 (semver) Affected: 1.26.0-0 , < 1.26.3 (semver)

Credits

Samy Ghannad

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 6.1,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "LOW",
              "integrityImpact": "LOW",
              "privilegesRequired": "NONE",
              "scope": "CHANGED",
              "userInteraction": "REQUIRED",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-39823",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-08T14:05:34.310805Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-08T14:05:55.152Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "html/template",
          "product": "html/template",
          "programRoutines": [
            {
              "name": "tMetaContent"
            },
            {
              "name": "Template.Execute"
            },
            {
              "name": "Template.ExecuteTemplate"
            }
          ],
          "vendor": "Go standard library",
          "versions": [
            {
              "lessThan": "1.25.10",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "1.26.3",
              "status": "affected",
              "version": "1.26.0-0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Samy Ghannad"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "CVE-2026-27142 fixed a vulnerability in which URLs were not correctly escaped inside of a \u003cmeta\u003e tag\u0027s \u003ccontent\u003e attribute. If the URL content were to insert ASCII whitespaces around the \u0027=\u0027 rune inside of the \u003ccontent\u003e attribute, the escaper would fail to similarly escape it, leading to XSS."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-07T19:41:19.524Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/issue/78913"
        },
        {
          "url": "https://go.dev/cl/769920"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/qcCIEXso47M"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-4982"
        }
      ],
      "title": "Bypass of meta content URL escaping causes XSS in html/template"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2026-39823",
    "datePublished": "2026-05-07T19:41:19.524Z",
    "dateReserved": "2026-04-07T18:13:03.527Z",
    "dateUpdated": "2026-05-08T14:05:55.152Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-39825 (GCVE-0-2026-39825)

Vulnerability from cvelistv5 – Published: 2026-05-07 19:41 – Updated: 2026-05-08 21:30

Title

ReverseProxy forwards queries with more than urlmaxqueryparams parameters in net/http/httputil

Summary

ReverseProxy can forward queries containing parameters not visible to Rewrite functions. When used with a Rewrite function, or a Director function which parses query parameters, ReverseProxy sanitizes the forwarded request to remove query parameters which are not parsed by url.ParseQuery. ReverseProxy does not take ParseQuery's limit on the total number of query parameters (controlled by GODEBUG=urlmaxqueryparams=N) into account. This can permit ReverseProxy to forward a request containing a query parameter that is not visible to the Rewrite function. For example, the query "a1=x&a2=x&...&a10000=x&hidden=y" can forward the parameter "hidden=y" while hiding it from the proxy's Rewrite function.

Severity ?

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CWE

CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

Assigner

References

4 references

URL	Tags
https://go.dev/cl/770541
https://go.dev/issue/78948
https://groups.google.com/g/golang-announce/c/qcC…
https://pkg.go.dev/vuln/GO-2026-4976

Impacted products

1 product

Vendor	Product	Version
Go standard library	net/http/httputil	Affected: 0 , < 1.25.10 (semver) Affected: 1.26.0-0 , < 1.26.3 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 5.3,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "LOW",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-39825",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-08T16:46:43.329507Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
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          "dateUpdated": "2026-05-08T21:30:08.872Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "net/http/httputil",
          "product": "net/http/httputil",
          "programRoutines": [
            {
              "name": "cleanQueryParams"
            },
            {
              "name": "ReverseProxy.ServeHTTP"
            }
          ],
          "vendor": "Go standard library",
          "versions": [
            {
              "lessThan": "1.25.10",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
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              "lessThan": "1.26.3",
              "status": "affected",
              "version": "1.26.0-0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "ReverseProxy can forward queries containing parameters not visible to Rewrite functions. When used with a Rewrite function, or a Director function which parses query parameters, ReverseProxy sanitizes the forwarded request to remove query parameters which are not parsed by url.ParseQuery. ReverseProxy does not take ParseQuery\u0027s limit on the total number of query parameters (controlled by GODEBUG=urlmaxqueryparams=N) into account. This can permit ReverseProxy to forward a request containing a query parameter that is not visible to the Rewrite function. For example, the query \"a1=x\u0026a2=x\u0026...\u0026a10000=x\u0026hidden=y\" can forward the parameter \"hidden=y\" while hiding it from the proxy\u0027s Rewrite function."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-444: Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request/Response Smuggling\u0027)",
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            }
          ]
        }
      ],
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        "dateUpdated": "2026-05-07T19:41:18.453Z",
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        "shortName": "Go"
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          "url": "https://go.dev/cl/770541"
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        {
          "url": "https://go.dev/issue/78948"
        },
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          "url": "https://groups.google.com/g/golang-announce/c/qcCIEXso47M"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-4976"
        }
      ],
      "title": "ReverseProxy forwards queries with more than urlmaxqueryparams parameters in net/http/httputil"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
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    "datePublished": "2026-05-07T19:41:18.453Z",
    "dateReserved": "2026-04-07T18:13:03.527Z",
    "dateUpdated": "2026-05-08T21:30:08.872Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-39826 (GCVE-0-2026-39826)

Vulnerability from cvelistv5 – Published: 2026-05-07 19:41 – Updated: 2026-05-08 14:05

Title

Escaper bypass leads to XSS in html/template

Summary

If a trusted template author were to write a <script> tag containing an empty 'type' attribute or a 'type' attribute with an ASCII whitespace, the execution of the template would incorrectly escape any data passed into the <script> block.

Severity ?

6.1 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

References

4 references

URL	Tags
https://go.dev/issue/78981
https://go.dev/cl/771180
https://groups.google.com/g/golang-announce/c/qcC…
https://pkg.go.dev/vuln/GO-2026-4980

Impacted products

1 product

Vendor	Product	Version
Go standard library	html/template	Affected: 0 , < 1.25.10 (semver) Affected: 1.26.0-0 , < 1.26.3 (semver)

Credits

Mundur (https://github.com/M0nd0R)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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          "defaultStatus": "unaffected",
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          "programRoutines": [
            {
              "name": "isJSType"
            },
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              "name": "Template.Execute"
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              "name": "Template.ExecuteTemplate"
            }
          ],
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          "lang": "en",
          "value": "If a trusted template author were to write a \u003cscript\u003e tag containing an empty \u0027type\u0027 attribute or a \u0027type\u0027 attribute with an ASCII whitespace, the execution of the template would incorrectly escape any data passed into the \u003cscript\u003e block."
        }
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          "url": "https://go.dev/issue/78981"
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          "url": "https://pkg.go.dev/vuln/GO-2026-4980"
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      ],
      "title": "Escaper bypass leads to XSS in html/template"
    }
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CVE-2026-39836 (GCVE-0-2026-39836)

Vulnerability from cvelistv5 – Published: 2026-05-07 19:41 – Updated: 2026-05-08 21:30

Title

Panic in Dial and LookupPort when handling NUL byte on Windows in net

Summary

The Dial and LookupPort functions panic on Windows when provided with an input containing a NUL (0).

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-248 - Uncaught Exception

Assigner

References

4 references

URL	Tags
https://go.dev/issue/79006
https://groups.google.com/g/golang-announce/c/qcC…
https://go.dev/cl/775320
https://pkg.go.dev/vuln/GO-2026-4971

Impacted products

1 product

Vendor	Product	Version
Go standard library	net	Affected: 0 , < 1.25.10 (semver) Affected: 1.26.0-0 , < 1.26.3 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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        },
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              "name": "Resolver.lookupPort"
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              "name": "Resolver.lookupNS"
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              "name": "Dial"
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              "name": "DialTimeout"
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              "name": "ListenConfig.Listen"
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              "name": "ListenConfig.ListenPacket"
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              "name": "ListenPacket"
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              "name": "LookupAddr"
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              "name": "LookupCNAME"
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              "name": "LookupHost"
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              "name": "LookupPort"
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              "name": "LookupTXT"
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            {
              "name": "ResolveIPAddr"
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              "name": "ResolveTCPAddr"
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              "name": "ResolveUDPAddr"
            },
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              "name": "Resolver.LookupAddr"
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              "name": "Resolver.LookupCNAME"
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              "name": "Resolver.LookupHost"
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            {
              "name": "Resolver.LookupIP"
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              "name": "Resolver.LookupIPAddr"
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              "name": "Resolver.LookupMX"
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              "name": "Resolver.LookupPort"
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          "url": "https://go.dev/cl/775320"
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CVE-2026-42499 (GCVE-0-2026-42499)

Vulnerability from cvelistv5 – Published: 2026-05-07 19:41 – Updated: 2026-05-08 21:29

Title

Quadratic string concatenation in consumePhrase in net/mail

Summary

Pathological inputs could cause DoS through consumePhrase when parsing an email address according to RFC 5322.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-407 - Inefficient Algorithmic Complexity

Assigner

References

4 references

URL	Tags
https://go.dev/issue/78987
https://go.dev/cl/771520
https://groups.google.com/g/golang-announce/c/qcC…
https://pkg.go.dev/vuln/GO-2026-4977

Impacted products

1 product

Vendor	Product	Version
Go standard library	net/mail	Affected: 0 , < 1.25.10 (semver) Affected: 1.26.0-0 , < 1.26.3 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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              "confidentialityImpact": "NONE",
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        },
        "title": "CISA ADP Vulnrichment"
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          "defaultStatus": "unaffected",
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              "name": "addrParser.consumePhrase"
            },
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              "name": "AddressParser.Parse"
            },
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          "url": "https://go.dev/issue/78987"
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          "url": "https://go.dev/cl/771520"
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          "url": "https://groups.google.com/g/golang-announce/c/qcCIEXso47M"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-4977"
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}

CVE-2026-42501 (GCVE-0-2026-42501)

Vulnerability from cvelistv5 – Published: 2026-05-07 19:41 – Updated: 2026-05-08 15:48

Title

Malicious module proxy can bypass checksum database in cmd/go

Summary

A malicious module proxy can exploit a flaw in the go command's validation of module checksums to bypass checksum database validation. This vulnerability affects any user using an untrusted module proxy (GOMODPROXY) or checksum database (GOSUMDB). A malicious module proxy can serve altered versions of the Go toolchain. When selecting a different version of the Go toolchain than the currently installed toolchain (due to the GOTOOLCHAIN environment variable, or a go.work or go.mod with a toolchain line), the go command will download and execute a toolchain provided by the module proxy. A malicious module proxy can bypass checksum database validation for this downloaded toolchain. Since this vulnerability affects the security of toolchain downloads, setting GOTOOLCHAIN to a fixed version is not sufficient. You must upgrade your base Go toolchain. The go tool always validates the hash of a toolchain before executing it, so fixed versions will refuse to execute any cached, altered versions of the toolchain. The go tool trusts go.sum files to contain accurate hashes of the current module's dependencies. A malicious proxy exploiting this vulnerability to serve an altered module will have caused an incorrect hash to be recorded in the go.sum. Users who have configured a non-trusted GOPROXY can determine if they have been affected by running "rm go.sum ; go mod tidy ; go mod verify", which will revalidate all dependencies of the current module. The specific flaw in more detail: The go command consults the checksum database to validate downloaded modules, when a module is not listed in the go.sum file. It verifies that the module hash reported by the checksum database matches the hash of the downloaded module. If, however, the checksum database returns a successful response that contains no entry for the module, the go command incorrectly permitted validation to succeed. A module proxy may mirror or proxy the checksum database, in which case the go command will not connect to the checksum database directly. Checksums reported by the checksum database are cryptographically signed, so a malicious proxy cannot alter the reported checksum for a module. However, a proxy which returns an empty checksum response, or a checksum response for an unrelated module, could cause the go command to proceed as if a downloaded module has been validated.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE

CWE-347 - Improper Verification of Cryptographic Signature

Assigner

References

4 references

URL	Tags
https://go.dev/cl/775321
https://go.dev/issue/79070
https://groups.google.com/g/golang-announce/c/qcC…
https://pkg.go.dev/vuln/GO-2026-4984

Impacted products

1 product

Vendor	Product	Version
Go toolchain	cmd/go	Affected: 0 , < 1.25.10 (semver) Affected: 1.26.0-0 , < 1.26.3 (semver)

Credits

Mundur (https://github.com/M0nd0R)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "REQUIRED",
              "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-42501",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-08T15:48:05.053316Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-347",
                "description": "CWE-347 Improper Verification of Cryptographic Signature",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-08T15:48:47.404Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "cmd/go",
          "product": "cmd/go",
          "vendor": "Go toolchain",
          "versions": [
            {
              "lessThan": "1.25.10",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "1.26.3",
              "status": "affected",
              "version": "1.26.0-0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Mundur (https://github.com/M0nd0R)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A malicious module proxy can exploit a flaw in the go command\u0027s validation of module checksums to bypass checksum database validation. This vulnerability affects any user using an untrusted module proxy (GOMODPROXY) or checksum database (GOSUMDB). A malicious module proxy can serve altered versions of the Go toolchain. When selecting a different version of the Go toolchain than the currently installed toolchain (due to the GOTOOLCHAIN environment variable, or a go.work or go.mod with a toolchain line), the go command will download and execute a toolchain provided by the module proxy. A malicious module proxy can bypass checksum database validation for this downloaded toolchain. Since this vulnerability affects the security of toolchain downloads, setting GOTOOLCHAIN to a fixed version is not sufficient. You must upgrade your base Go toolchain. The go tool always validates the hash of a toolchain before executing it, so fixed versions will refuse to execute any cached, altered versions of the toolchain. The go tool trusts go.sum files to contain accurate hashes of the current module\u0027s dependencies. A malicious proxy exploiting this vulnerability to serve an altered module will have caused an incorrect hash to be recorded in the go.sum. Users who have configured a non-trusted GOPROXY can determine if they have been affected by running \"rm go.sum ; go mod tidy ; go mod verify\", which will revalidate all dependencies of the current module. The specific flaw in more detail: The go command consults the checksum database to validate downloaded modules, when a module is not listed in the go.sum file. It verifies that the module hash reported by the checksum database matches the hash of the downloaded module. If, however, the checksum database returns a successful response that contains no entry for the module, the go command incorrectly permitted validation to succeed. A module proxy may mirror or proxy the checksum database, in which case the go command will not connect to the checksum database directly. Checksums reported by the checksum database are cryptographically signed, so a malicious proxy cannot alter the reported checksum for a module. However, a proxy which returns an empty checksum response, or a checksum response for an unrelated module, could cause the go command to proceed as if a downloaded module has been validated."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-347: Improper Verification of Cryptographic Signature",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-07T19:41:19.691Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/cl/775321"
        },
        {
          "url": "https://go.dev/issue/79070"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/qcCIEXso47M"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-4984"
        }
      ],
      "title": "Malicious module proxy can bypass checksum database in cmd/go"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2026-42501",
    "datePublished": "2026-05-07T19:41:19.691Z",
    "dateReserved": "2026-04-28T00:21:12.791Z",
    "dateUpdated": "2026-05-08T15:48:47.404Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

Vulnerability from cleanstart

CVE-2026-39820 (GCVE-0-2026-39820)

CVE-2026-39823 (GCVE-0-2026-39823)

CVE-2026-39825 (GCVE-0-2026-39825)

CVE-2026-39826 (GCVE-0-2026-39826)

CVE-2026-39836 (GCVE-0-2026-39836)

CVE-2026-42499 (GCVE-0-2026-42499)

CVE-2026-42501 (GCVE-0-2026-42501)

Tags

Sightings

Nomenclature