Vulnerability-Lookup

CVE-2026-34475 (GCVE-0-2026-34475)

Vulnerability from cvelistv5 – Published: 2026-03-27 19:40 – Updated: 2026-03-27 20:01

Summary

Varnish Cache before 8.0.1 and Varnish Enterprise before 6.0.16r12, in certain unchecked req.url scenarios, mishandle URLs with a path of / for HTTP/1.1, potentially leading to cache poisoning or authentication bypass.

Severity

5.4 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-03-27 20:00 UTC

CWE

CWE-180 - Incorrect Behavior Order: Validate Before Canonicalize

Assigner

mitre CNA under the mitre root

CNA scorecard E 28/100 over 2333 records in the last 180 days details

References

1 reference

URL	Tags
https://vinyl-cache.org/security/VSV00018.html

Impacted products

1 product

Vendor	Product	Version	CPE status
varnish-software	Varnish Cache	Affected: 0 , < 6.0.17 LTS (custom) Affected: 7.0.0 , < 8.0.1 (custom) cpe:2.3:a:varnish-software:varnish_cache:::::::: cpe:2.3:a:varnish-software:varnish_cache::::::::

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-34475

Vulnerability from fkie_nvd - Published: 2026-03-27 20:16 - Updated: 2026-06-17 10:39

Severity

5.4 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

References

	URL	Tags
	cve@mitre.org	https://vinyl-cache.org/security/VSV00018.html	Mitigation, Vendor Advisory

Impacted products

Vendor	Product	Version
varnish-software	varnish_enterprise	*
varnish-software	varnish_enterprise	6.0.16
varnish-software	varnish_enterprise	6.0.16
varnish-software	varnish_enterprise	6.0.16
varnish-software	varnish_enterprise	6.0.16
varnish-software	varnish_enterprise	6.0.16
varnish-software	varnish_enterprise	6.0.16
varnish-software	varnish_enterprise	6.0.16
varnish-software	varnish_enterprise	6.0.16
varnish-software	varnish_enterprise	6.0.16
varnish-software	varnish_enterprise	6.0.16
varnish-software	varnish_enterprise	6.0.16
vinyl-cache	vinyl_cache	*

JSON

To clipboard

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              "criteria": "cpe:2.3:a:varnish-software:varnish_enterprise:6.0.16:r7:*:*:*:*:*:*",
              "matchCriteriaId": "27B776B2-9C38-45BE-89E4-ECDEEAE538A9",
              "vulnerable": true
            },
            {
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              "matchCriteriaId": "ED3CA600-C88D-4825-8C36-E052822AF59F",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:varnish-software:varnish_enterprise:6.0.16:r9:*:*:*:*:*:*",
              "matchCriteriaId": "6B1D57B1-9771-4195-9EE3-B26EA776FB6B",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:vinyl-cache:vinyl_cache:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "3C1ED7AA-6E2F-4C75-82D3-D7C2CB125C48",
              "versionEndExcluding": "8.0.1",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Varnish Cache before 8.0.1 and Varnish Enterprise before 6.0.16r12, in certain unchecked req.url scenarios, mishandle URLs with a path of / for HTTP/1.1, potentially leading to cache poisoning or authentication bypass."
    }
  ],
  "id": "CVE-2026-34475",
  "lastModified": "2026-06-17T10:39:06.377",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.4,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 2.7,
        "source": "cve@mitre.org",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-34475",
          "options": [
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              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-03-27T20:00:56.066373Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-03-27T20:16:36.390",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://vinyl-cache.org/security/VSV00018.html"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-180"
        }
      ],
      "source": "cve@mitre.org",
      "type": "Secondary"
    }
  ]
}

GHSA-M9GQ-CMCJ-P62X

Vulnerability from github – Published: 2026-03-27 21:31 – Updated: 2026-03-27 21:31

Details

Severity

5.4 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-34475"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-180"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-27T20:16:36Z",
    "severity": "MODERATE"
  },
  "details": "Varnish Cache before 8.0.1 and Varnish Enterprise before 6.0.16r12, in certain unchecked req.url scenarios, mishandle URLs with a path of / for HTTP/1.1, potentially leading to cache poisoning or authentication bypass.",
  "id": "GHSA-m9gq-cmcj-p62x",
  "modified": "2026-03-27T21:31:37Z",
  "published": "2026-03-27T21:31:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34475"
    },
    {
      "type": "WEB",
      "url": "https://vinyl-cache.org/security/VSV00018.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

OESA-2026-2677 (CVE-2026-34475)

Vulnerability from osv_openeuler – Published: 2026-06-12 11:11 – Updated: 2026-08-06 11:11 – Source website

Summary

varnish security update

Details

This is Varnish Cache, a web application accelerator also known as a caching HTTP reverse proxy. You install it in front of any server that speaks HTTP and configure it to cache the contents. Varnish Cache is really, really fast. It typically speeds up delivery with a factor of 300 - 1000x, depending on your architecture.

Security Fix(es):

Severity

9.8 (Critical)


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

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-34475	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "varnish-7.4.3-5.oe2403sp3.aarch64.rpm",
          "varnish-debuginfo-7.4.3-5.oe2403sp3.aarch64.rpm",
          "varnish-debugsource-7.4.3-5.oe2403sp3.aarch64.rpm",
          "varnish-devel-7.4.3-5.oe2403sp3.aarch64.rpm"
        ],
        "noarch": [
          "varnish-help-7.4.3-5.oe2403sp3.noarch.rpm"
        ],
        "src": [
          "varnish-7.4.3-5.oe2403sp3.src.rpm"
        ],
        "x86_64": [
          "varnish-7.4.3-5.oe2403sp3.x86_64.rpm",
          "varnish-debuginfo-7.4.3-5.oe2403sp3.x86_64.rpm",
          "varnish-debugsource-7.4.3-5.oe2403sp3.x86_64.rpm",
          "varnish-devel-7.4.3-5.oe2403sp3.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP3",
        "name": "varnish",
        "purl": "pkg:rpm/openEuler/varnish\u0026distro=openEuler-24.03-LTS-SP3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.4.3-5.oe2403sp3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "varnish-7.4.3-5.oe2003sp4.aarch64.rpm",
          "varnish-debuginfo-7.4.3-5.oe2003sp4.aarch64.rpm",
          "varnish-debugsource-7.4.3-5.oe2003sp4.aarch64.rpm",
          "varnish-devel-7.4.3-5.oe2003sp4.aarch64.rpm"
        ],
        "noarch": [
          "varnish-help-7.4.3-5.oe2003sp4.noarch.rpm"
        ],
        "src": [
          "varnish-7.4.3-5.oe2003sp4.src.rpm"
        ],
        "x86_64": [
          "varnish-7.4.3-5.oe2003sp4.x86_64.rpm",
          "varnish-debuginfo-7.4.3-5.oe2003sp4.x86_64.rpm",
          "varnish-debugsource-7.4.3-5.oe2003sp4.x86_64.rpm",
          "varnish-devel-7.4.3-5.oe2003sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP4",
        "name": "varnish",
        "purl": "pkg:rpm/openEuler/varnish\u0026distro=openEuler-20.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.4.3-5.oe2003sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "varnish-7.4.3-5.oe2203sp4.aarch64.rpm",
          "varnish-debuginfo-7.4.3-5.oe2203sp4.aarch64.rpm",
          "varnish-debugsource-7.4.3-5.oe2203sp4.aarch64.rpm",
          "varnish-devel-7.4.3-5.oe2203sp4.aarch64.rpm"
        ],
        "noarch": [
          "varnish-help-7.4.3-5.oe2203sp4.noarch.rpm"
        ],
        "src": [
          "varnish-7.4.3-5.oe2203sp4.src.rpm"
        ],
        "x86_64": [
          "varnish-7.4.3-5.oe2203sp4.x86_64.rpm",
          "varnish-debuginfo-7.4.3-5.oe2203sp4.x86_64.rpm",
          "varnish-debugsource-7.4.3-5.oe2203sp4.x86_64.rpm",
          "varnish-devel-7.4.3-5.oe2203sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS-SP4",
        "name": "varnish",
        "purl": "pkg:rpm/openEuler/varnish\u0026distro=openEuler-22.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.4.3-5.oe2203sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "varnish-7.4.3-5.oe2403sp1.aarch64.rpm",
          "varnish-debuginfo-7.4.3-5.oe2403sp1.aarch64.rpm",
          "varnish-debugsource-7.4.3-5.oe2403sp1.aarch64.rpm",
          "varnish-devel-7.4.3-5.oe2403sp1.aarch64.rpm"
        ],
        "noarch": [
          "varnish-help-7.4.3-5.oe2403sp1.noarch.rpm"
        ],
        "src": [
          "varnish-7.4.3-5.oe2403sp1.src.rpm"
        ],
        "x86_64": [
          "varnish-7.4.3-5.oe2403sp1.x86_64.rpm",
          "varnish-debuginfo-7.4.3-5.oe2403sp1.x86_64.rpm",
          "varnish-debugsource-7.4.3-5.oe2403sp1.x86_64.rpm",
          "varnish-devel-7.4.3-5.oe2403sp1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP1",
        "name": "varnish",
        "purl": "pkg:rpm/openEuler/varnish\u0026distro=openEuler-24.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.4.3-5.oe2403sp1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Critical"
  },
  "details": "This is Varnish Cache, a web application accelerator also known as a caching HTTP reverse proxy. You install it in front of any server that speaks HTTP and configure it to cache the contents. Varnish Cache is really, really fast. It typically speeds up delivery with a factor of 300 - 1000x, depending on your architecture.\r\n\r\nSecurity Fix(es):\n\nVarnish Cache before 8.0.1 and Varnish Enterprise before 6.0.16r12, in certain unchecked req.url scenarios, mishandle URLs with a path of / for HTTP/1.1, potentially leading to cache poisoning or authentication bypass.(CVE-2026-34475)",
  "id": "OESA-2026-2677",
  "modified": "2026-08-06T11:11:36Z",
  "published": "2026-06-12T11:11:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2677"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34475"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "varnish security update",
  "upstream": [
    "CVE-2026-34475"
  ]
}

OESA-2026-3045 (CVE-2026-34475)

Vulnerability from osv_openeuler – Published: 2026-07-19 11:11 – Updated: 2026-08-06 11:11 – Source website

Summary

varnish security update

Details

Security Fix(es):

Severity

9.8 (Critical)


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

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-34475	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "varnish-7.4.3-5.oe2403sp4.aarch64.rpm",
          "varnish-debuginfo-7.4.3-5.oe2403sp4.aarch64.rpm",
          "varnish-debugsource-7.4.3-5.oe2403sp4.aarch64.rpm",
          "varnish-devel-7.4.3-5.oe2403sp4.aarch64.rpm"
        ],
        "noarch": [
          "varnish-help-7.4.3-5.oe2403sp4.noarch.rpm"
        ],
        "src": [
          "varnish-7.4.3-5.oe2403sp4.src.rpm"
        ],
        "x86_64": [
          "varnish-7.4.3-5.oe2403sp4.x86_64.rpm",
          "varnish-debuginfo-7.4.3-5.oe2403sp4.x86_64.rpm",
          "varnish-debugsource-7.4.3-5.oe2403sp4.x86_64.rpm",
          "varnish-devel-7.4.3-5.oe2403sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP4",
        "name": "varnish",
        "purl": "pkg:rpm/openEuler/varnish\u0026distro=openEuler-24.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.4.3-5.oe2403sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Critical"
  },
  "details": "This is Varnish Cache, a web application accelerator also known as a caching HTTP reverse proxy. You install it in front of any server that speaks HTTP and configure it to cache the contents. Varnish Cache is really, really fast. It typically speeds up delivery with a factor of 300 - 1000x, depending on your architecture.\r\n\r\nSecurity Fix(es):\n\nVarnish Cache before 8.0.1 and Varnish Enterprise before 6.0.16r12, in certain unchecked req.url scenarios, mishandle URLs with a path of / for HTTP/1.1, potentially leading to cache poisoning or authentication bypass.(CVE-2026-34475)",
  "id": "OESA-2026-3045",
  "modified": "2026-08-06T11:11:56Z",
  "published": "2026-07-19T11:11:56Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3045"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34475"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "varnish security update",
  "upstream": [
    "CVE-2026-34475"
  ]
}

UBUNTU-CVE-2026-34475 (CVE-2026-34475)

Vulnerability from osv_ubuntu – Published: 2026-03-27 20:16 – Updated: 2026-05-20 15:27 – Source website

Details

Severity

5.4 (Medium)


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

9.8 (Critical)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-34475	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-34475	REPORT
	https://vinyl-cache.org/security/VSV00018.html	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libvarnishapi1",
            "binary_version": "3.0.5-2ubuntu0.1"
          },
          {
            "binary_name": "varnish",
            "binary_version": "3.0.5-2ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:14.04:LTS",
        "name": "varnish",
        "purl": "pkg:deb/ubuntu/varnish@3.0.5-2ubuntu0.1?arch=source\u0026distro=trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.0.4-1ubuntu1",
        "3.0.4-1ubuntu2",
        "3.0.5-1ubuntu2",
        "3.0.5-2",
        "3.0.5-2ubuntu0.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libvarnishapi1",
            "binary_version": "4.1.1-1ubuntu0.2+esm1"
          },
          {
            "binary_name": "varnish",
            "binary_version": "4.1.1-1ubuntu0.2+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "varnish",
        "purl": "pkg:deb/ubuntu/varnish@4.1.1-1ubuntu0.2+esm1?arch=source\u0026distro=esm-apps/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.0.3-1",
        "4.1.0-1",
        "4.1.0-2",
        "4.1.1-1",
        "4.1.1-1ubuntu0.2",
        "4.1.1-1ubuntu0.2+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libvarnishapi1",
            "binary_version": "5.2.1-1ubuntu0.1+esm1"
          },
          {
            "binary_name": "varnish",
            "binary_version": "5.2.1-1ubuntu0.1+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "varnish",
        "purl": "pkg:deb/ubuntu/varnish@5.2.1-1ubuntu0.1+esm1?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.0.0-7.1",
        "5.2.1-1",
        "5.2.1-1ubuntu0.1",
        "5.2.1-1ubuntu0.1+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libvarnishapi2",
            "binary_version": "6.2.1-2ubuntu0.2+esm1"
          },
          {
            "binary_name": "varnish",
            "binary_version": "6.2.1-2ubuntu0.2+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "varnish",
        "purl": "pkg:deb/ubuntu/varnish@6.2.1-2ubuntu0.2+esm1?arch=source\u0026distro=esm-apps/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.1.1-1",
        "6.2.1-2",
        "6.2.1-2ubuntu0.1~esm1",
        "6.2.1-2ubuntu0.1~esm2",
        "6.2.1-2ubuntu0.1",
        "6.2.1-2ubuntu0.2",
        "6.2.1-2ubuntu0.2+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libvarnishapi2",
            "binary_version": "6.6.1-1ubuntu0.2+esm1"
          },
          {
            "binary_name": "varnish",
            "binary_version": "6.6.1-1ubuntu0.2+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:22.04:LTS",
        "name": "varnish",
        "purl": "pkg:deb/ubuntu/varnish@6.6.1-1ubuntu0.2+esm1?arch=source\u0026distro=esm-apps/jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.5.2-1",
        "6.6.1-1",
        "6.6.1-1ubuntu0.2",
        "6.6.1-1ubuntu0.2+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libvarnishapi3",
            "binary_version": "7.1.1-1.1ubuntu1"
          },
          {
            "binary_name": "varnish",
            "binary_version": "7.1.1-1.1ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "varnish",
        "purl": "pkg:deb/ubuntu/varnish@7.1.1-1.1ubuntu1?arch=source\u0026distro=noble"
      },
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    },
    {
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        "binaries": [
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            "binary_version": "7.7.3-1"
          },
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            "binary_version": "7.7.3-1"
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      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "varnish",
        "purl": "pkg:deb/ubuntu/varnish@7.7.3-1?arch=source\u0026distro=questing"
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    {
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          {
            "binary_name": "libvarnishapi3",
            "binary_version": "7.7.3-1build1"
          },
          {
            "binary_name": "varnish",
            "binary_version": "7.7.3-1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "varnish",
        "purl": "pkg:deb/ubuntu/varnish@7.7.3-1build1?arch=source\u0026distro=resolute"
      },
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      "versions": [
        "7.7.3-1",
        "7.7.3-1build1"
      ]
    }
  ],
  "aliases": [],
  "details": "Varnish Cache before 8.0.1 and Varnish Enterprise before 6.0.16r12, in certain unchecked req.url scenarios, mishandle URLs with a path of / for HTTP/1.1, potentially leading to cache poisoning or authentication bypass.",
  "id": "UBUNTU-CVE-2026-34475",
  "modified": "2026-05-20T15:27:23Z",
  "published": "2026-03-27T20:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-34475"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-34475"
    },
    {
      "type": "REPORT",
      "url": "https://vinyl-cache.org/security/VSV00018.html"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-34475"
  ]
}

WID-SEC-W-2026-0749

Vulnerability from csaf_certbund - Published: 2026-03-16 23:00 - Updated: 2026-04-22 22:00

Summary

Varnish HTTP Cache: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen

Severity

Mittel

Scope

1 vulnerability in this advisory, including CVE-2026-34475.

CVE-2026-34475

Known affected: 4 products

Open the full advisory

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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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.

Action not permitted

CVE-2026-34475 (GCVE-0-2026-34475)

FKIE_CVE-2026-34475

GHSA-M9GQ-CMCJ-P62X

OESA-2026-2677 (CVE-2026-34475)

OESA-2026-3045 (CVE-2026-34475)

UBUNTU-CVE-2026-34475 (CVE-2026-34475)

WID-SEC-W-2026-0749

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Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour