Vulnerability-Lookup

oesa-2026-2269

Vulnerability from osv_openeuler

Published

2026-05-09 11:11

Modified

2026-08-06 11:11

Summary

python3 security update

Details

Python combines remarkable power with very clear syntax. It has modules, classes, exceptions, very high level dynamic data types, and dynamic typing. There are interfaces to many system calls and libraries, as well as to various windowing systems. New built-in modules are easily written in C or C++ (or other languages, depending on the chosen implementation). Python is also usable as an extension language for applications written in other languages that need easy-to-use scripting or automation interfaces.

Security Fix(es):

http.cookies.Morsel.js_output() returns an inline <script> snippet and only escapes " for JavaScript string context. It does not neutralize the HTML parser-sensitive sequence </script> inside the generated script element. Mitigation base64-encodes the cookie value to disallow escaping using cookie value.(CVE-2026-6019)

Severity

2.1 (Low)


                    
                      CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-6019	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "python3-3.11.6-26.oe2403.aarch64.rpm",
          "python3-debug-3.11.6-26.oe2403.aarch64.rpm",
          "python3-debuginfo-3.11.6-26.oe2403.aarch64.rpm",
          "python3-debugsource-3.11.6-26.oe2403.aarch64.rpm",
          "python3-devel-3.11.6-26.oe2403.aarch64.rpm",
          "python3-tkinter-3.11.6-26.oe2403.aarch64.rpm",
          "python3-unversioned-command-3.11.6-26.oe2403.aarch64.rpm"
        ],
        "noarch": [
          "python3-help-3.11.6-26.oe2403.noarch.rpm"
        ],
        "src": [
          "python3-3.11.6-26.oe2403.src.rpm"
        ],
        "x86_64": [
          "python3-3.11.6-26.oe2403.x86_64.rpm",
          "python3-debug-3.11.6-26.oe2403.x86_64.rpm",
          "python3-debuginfo-3.11.6-26.oe2403.x86_64.rpm",
          "python3-debugsource-3.11.6-26.oe2403.x86_64.rpm",
          "python3-devel-3.11.6-26.oe2403.x86_64.rpm",
          "python3-tkinter-3.11.6-26.oe2403.x86_64.rpm",
          "python3-unversioned-command-3.11.6-26.oe2403.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS",
        "name": "python3",
        "purl": "pkg:rpm/openEuler/python3\u0026distro=openEuler-24.03-LTS"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.11.6-26.oe2403"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Low"
  },
  "details": "Python combines remarkable power with very clear syntax. It has modules, classes, exceptions, very high level dynamic data types, and dynamic typing. There are interfaces to many system calls and libraries, as well as to various windowing systems. New built-in modules are easily written in C or C++ (or other languages, depending on the chosen implementation). Python is also usable as an extension language for applications written in other languages that need easy-to-use scripting or automation interfaces.\r\n\r\nSecurity Fix(es):\n\nhttp.cookies.Morsel.js_output() returns an inline \u0026lt;script\u0026gt; snippet and only escapes \u0026quot; for JavaScript string context. It does not neutralize the HTML parser-sensitive sequence \u0026lt;/script\u0026gt; inside the generated script element. Mitigation base64-encodes the cookie value to disallow escaping using cookie value.(CVE-2026-6019)",
  "id": "OESA-2026-2269",
  "modified": "2026-08-06T11:11:14Z",
  "published": "2026-05-09T11:11:14Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2269"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6019"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ],
  "summary": "python3 security update",
  "upstream": [
    "CVE-2026-6019"
  ]
}

CVE-2026-6019 (GCVE-0-2026-6019)

Vulnerability from cvelistv5 – Published: 2026-04-22 19:28 – Updated: 2026-06-10 18:58

Title

BaseCookie.js_output() does not neutralize embedded characters

Summary

Severity

2.1 (Low)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-22 20:02 UTC

CWE

CWE-150 - Improper neutralization of escape, meta, or control sequences

Assigner

PSF mitre root

References

6 references

URL	Tags
https://github.com/python/cpython/pull/148848	patch
https://github.com/python/cpython/issues/90309	issue-tracking
https://mail.python.org/archives/list/security-an…	vendor-advisory
https://github.com/python/cpython/commit/76b3923d…	patch
https://github.com/python/cpython/commit/3c59b8b5…	patch
https://github.com/python/cpython/commit/f795e042…	patch

Impacted products

1 product

Vendor	Product	Version
Python Software Foundation	CPython	Affected: 0 , < 3.13.14 (python) Affected: 3.14.0a1 , < 3.14.5rc1 (python) Affected: 3.15.0a1 , < 3.15.0b1 (python)

Credits

oolongeya (https://github.com/komi22) Seth Larson (https://github.com/sethmlarson)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-6019",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-22T20:02:17.071906Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-22T20:02:34.468Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "CPython",
          "repo": "https://github.com/python/cpython",
          "vendor": "Python Software Foundation",
          "versions": [
            {
              "lessThan": "3.13.14",
              "status": "affected",
              "version": "0",
              "versionType": "python"
            },
            {
              "lessThan": "3.14.5rc1",
              "status": "affected",
              "version": "3.14.0a1",
              "versionType": "python"
            },
            {
              "lessThan": "3.15.0b1",
              "status": "affected",
              "version": "3.15.0a1",
              "versionType": "python"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "oolongeya (https://github.com/komi22)"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "Seth Larson (https://github.com/sethmlarson)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003ccode\u003ehttp.cookies.Morsel.js_output()\u003c/code\u003e returns an inline \u003ccode\u003e\u0026lt;script\u0026gt;\u003c/code\u003e snippet and only escapes \u003ccode\u003e\"\u003c/code\u003e for JavaScript string context. It does not neutralize the HTML parser-sensitive sequence \u003ccode\u003e\u0026lt;/script\u0026gt;\u003c/code\u003e inside the generated script element. Mitigation base64-encodes the cookie value to disallow escaping using cookie value."
            }
          ],
          "value": "http.cookies.Morsel.js_output() returns an inline \u003cscript\u003e snippet and only escapes \" for JavaScript string context. It does not neutralize the HTML parser-sensitive sequence \u003c/script\u003e inside the generated script element. Mitigation base64-encodes the cookie value to disallow escaping using cookie value."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 2.1,
            "baseSeverity": "LOW",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "HIGH",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "LOW",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
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              "value": "GENERAL"
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      "problemTypes": [
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-10T18:58:07.798Z",
        "orgId": "28c92f92-d60d-412d-b760-e73465c3df22",
        "shortName": "PSF"
      },
      "references": [
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          "tags": [
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          "url": "https://github.com/python/cpython/pull/148848"
        },
        {
          "tags": [
            "issue-tracking"
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          "url": "https://github.com/python/cpython/issues/90309"
        },
        {
          "tags": [
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          "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/IVNWGV2BBNC3RHQAFS22UP4DY56SAXX3/"
        },
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          "tags": [
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      "source": {
        "discovery": "UNKNOWN"
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      "title": "BaseCookie.js_output() does not neutralize embedded characters",
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  },
  "cveMetadata": {
    "assignerOrgId": "28c92f92-d60d-412d-b760-e73465c3df22",
    "assignerShortName": "PSF",
    "cveId": "CVE-2026-6019",
    "datePublished": "2026-04-22T19:28:08.720Z",
    "dateReserved": "2026-04-09T15:35:00.668Z",
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    "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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.