Vulnerability-Lookup

CVE-2026-63771 (GCVE-0-2026-63771)

Vulnerability from cvelistv5 – Published: 2026-07-20 18:57 – Updated: 2026-07-21 11:08 X_Open Source

Title

Adminer < 5.4.3 Cookie Injection via X-Forwarded-Prefix Header

Summary

Adminer before 5.4.3 contains a cookie injection vulnerability that allows attackers to manipulate cookie attributes by injecting arbitrary values through the unsanitized X-Forwarded-Prefix HTTP header used in Set-Cookie path attributes. Attackers can exploit a misconfigured reverse proxy to downgrade SameSite protection and enable cross-origin authenticated requests, bypassing cookie security controls.

Severity

6 (Medium)


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

7.1 (High)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-113 - Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')

Assigner

VulnCheck

References

4 references

URL	Tags
https://github.com/vrana/adminer/issues/1298	technical-descriptionexploitissue-tracking
https://github.com/vrana/adminer/security/advisor…	vendor-advisory
https://github.com/vrana/adminer/releases#release…	release-notes
https://www.vulncheck.com/advisories/adminer-cook…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
vrana	adminer	Affected: 0 , < 5.4.3 (semver)

Date Public

2026-07-05 00:00

Credits

George Chen

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-63771

Vulnerability from fkie_nvd - Published: 2026-07-20 19:17 - Updated: 2026-07-20 22:17

Severity

7.1 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

Summary

References

	URL	Tags
	disclosure@vulncheck.com	https://github.com/vrana/adminer/issues/1298
	disclosure@vulncheck.com	https://github.com/vrana/adminer/releases#release-v5.4.3
	disclosure@vulncheck.com	https://github.com/vrana/adminer/security/advisories/GHSA-c533-9qwm-8w5h
	disclosure@vulncheck.com	https://www.vulncheck.com/advisories/adminer-cookie-injection-via-x-forwarded-prefix-header

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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          "defaultStatus": "unaffected",
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  "lastModified": "2026-07-20T22:17:18.200",
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GHSA-HVV2-8JPJ-GR8H

Vulnerability from github – Published: 2026-07-20 21:31 – Updated: 2026-07-20 21:31

Details

Severity

7.1 (High)


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

6.0 (Medium)


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

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-63771"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-113"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-20T19:17:29Z",
    "severity": "MODERATE"
  },
  "details": "Adminer before 5.4.3 contains a cookie injection vulnerability that allows attackers to manipulate cookie attributes by injecting arbitrary values through the unsanitized X-Forwarded-Prefix HTTP header used in Set-Cookie path attributes. Attackers can exploit a misconfigured reverse proxy to downgrade SameSite protection and enable cross-origin authenticated requests, bypassing cookie security controls.",
  "id": "GHSA-hvv2-8jpj-gr8h",
  "modified": "2026-07-20T21:31:49Z",
  "published": "2026-07-20T21:31:49Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/vrana/adminer/security/advisories/GHSA-c533-9qwm-8w5h"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63771"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vrana/adminer/issues/1298"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vrana/adminer/releases#release-v5.4.3"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/adminer-cookie-injection-via-x-forwarded-prefix-header"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/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"
    }
  ]
}

ubuntu-cve-2026-63771

Vulnerability from osv_ubuntu

Published

2026-07-22 00:00

Modified

2026-07-24 13:16

Summary

Details

(Adminer before 5.4.3 contains a cookie injection vulnerability that al ...)

Severity

7.1 (High)


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

6.0 (Medium)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-63771	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-63771	REPORT
	https://github.com/vrana/adminer/issues/1298	REPORT
	https://github.com/vrana/adminer/security/advisor…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "adminer",
            "binary_version": "4.2.1-1ubuntu1+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "adminer",
        "purl": "pkg:deb/ubuntu/adminer@4.2.1-1ubuntu1+esm1?arch=source\u0026distro=esm-apps/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.2.1-1",
        "4.2.1-1ubuntu1",
        "4.2.1-1ubuntu1+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "adminer",
            "binary_version": "4.6.2-1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "adminer",
        "purl": "pkg:deb/ubuntu/adminer@4.6.2-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.3.1-2",
        "4.5.0-1",
        "4.6.1-1",
        "4.6.2-1",
        "4.6.2-1ubuntu0.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "adminer",
            "binary_version": "4.7.6-1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "adminer",
        "purl": "pkg:deb/ubuntu/adminer@4.7.6-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.7.2-1",
        "4.7.4-1",
        "4.7.5-1",
        "4.7.6-1",
        "4.7.6-1ubuntu0.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "adminer",
            "binary_version": "4.8.1-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "adminer",
        "purl": "pkg:deb/ubuntu/adminer@4.8.1-1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.7.9-2",
        "4.8.1-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "adminer",
            "binary_version": "4.8.1-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "adminer",
        "purl": "pkg:deb/ubuntu/adminer@4.8.1-2?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.8.1-1",
        "4.8.1-1ubuntu1",
        "4.8.1-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "adminer",
            "binary_version": "5.4.1+dfsg-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "adminer",
        "purl": "pkg:deb/ubuntu/adminer@5.4.1+dfsg-1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.2.1+dfsg-1",
        "5.3.0+dfsg-1",
        "5.4.0+dfsg-1",
        "5.4.1+dfsg-1"
      ]
    }
  ],
  "aliases": [],
  "details": "(Adminer before 5.4.3 contains a cookie injection vulnerability that al ...)",
  "id": "UBUNTU-CVE-2026-63771",
  "modified": "2026-07-24T13:16:51Z",
  "published": "2026-07-22T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-63771"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-63771"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/vrana/adminer/issues/1298"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/vrana/adminer/security/advisories/GHSA-c533-9qwm-8w5h"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-63771"
  ]
}

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.

Action not permitted

CVE-2026-63771 (GCVE-0-2026-63771)

FKIE_CVE-2026-63771

GHSA-HVV2-8JPJ-GR8H

ubuntu-cve-2026-63771

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature