Vulnerability-Lookup

GHSA-869J-R97X-HX2G

Vulnerability from github – Published: 2026-06-19 22:10 – Updated: 2026-06-19 22:10

Summary

Anki's local HTTP server does not sufficiently validate requests

Details

Summary

Anki launches a local HTTP server to serve media files and web pages for parts of its interface. The server fails to validate requests in the following ways: 1. No sufficient validation of the Origin header. 2. Some endpoints are vulnerable to path traversal attacks.

This allows malicious websites to exfiltrate local files given a known path.

Browser impact

The severity varies by browser because of Private Network Access (PNA), a newer spec that restricts web pages from making requests to localhost/local network addresses:

Chrome/Chromium (including Edge, Brave): Largely protected, as Chrome has implemented PNA restrictions for several years and now puts local network access behind a permission prompt. Safari: Hasn't implemented PNA yet, though macOS has some OS-level protections. Firefox: Most vulnerable — hasn't implemented PNA yet, though it's reportedly planned for Firefox 151.

Patches

The issue was fixed as of Anki 25.09.3

Severity

8.7 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 25.9.2"
      },
      "package": {
        "ecosystem": "PyPI",
        "name": "aqt"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "25.9.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-22",
      "CWE-346"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-19T22:10:57Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "## Summary\n\nAnki launches a local HTTP server to serve media files and web pages for parts of its interface. The server fails to validate requests in the following ways:\n1. No sufficient validation of the Origin header.\n2. Some endpoints are vulnerable to path traversal attacks.\n\nThis allows malicious websites to exfiltrate local files given a known path.\n\n## Browser impact\n\nThe severity varies by browser because of Private Network Access (PNA), a newer spec that restricts web pages from making requests to localhost/local network addresses:\n\nChrome/Chromium (including Edge, Brave): Largely protected, as Chrome has implemented PNA restrictions for several years and now puts local network access behind a permission prompt.\nSafari: Hasn\u0027t implemented PNA yet, though macOS has some OS-level protections.\nFirefox: Most vulnerable \u2014 hasn\u0027t implemented PNA yet, though it\u0027s reportedly planned for Firefox 151.\n\n## Patches\n\nThe issue was fixed as of Anki 25.09.3",
  "id": "GHSA-869j-r97x-hx2g",
  "modified": "2026-06-19T22:10:57Z",
  "published": "2026-06-19T22:10:57Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/ankitects/anki/security/advisories/GHSA-869j-r97x-hx2g"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/ankitects/anki"
    },
    {
      "type": "WEB",
      "url": "https://x.com/taviso/status/2051310678800253318"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Anki\u0027s local HTTP server does not sufficiently validate requests"
}

CVE-2026-59153 (GCVE-0-2026-59153)

Vulnerability from cvelistv5 – Published: 2026-07-07 21:11 – Updated: 2026-07-08 13:50

Title

Anki's local HTTP server does not sufficiently validate requests

Summary

Anki is a program for creating and reviewing flashcards. Prior to 25.09.3, Anki launches a local HTTP server to serve media files and web pages for parts of its interface, but requests from other origins were not sufficiently blocked. A malicious website could potentially trigger side-effecting requests to the local server, with severity varying by browser depending on Private Network Access protections. This issue is fixed in version 25.09.3.

Severity

2.1 (Low)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-346 - Origin Validation Error

Assigner

GitHub_M

References

4 references

URL	Tags
https://github.com/ankitects/anki/security/adviso…	x_refsource_CONFIRM
https://github.com/ankitects/anki/commit/858e5689…	x_refsource_MISC
https://github.com/ankitects/anki/releases/tag/25.09.3	x_refsource_MISC
https://x.com/taviso/status/2051310678800253318	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
ankitects	anki	Affected: < 25.09.3

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-59153",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-08T13:49:55.586751Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-08T13:50:15.783Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "anki",
          "vendor": "ankitects",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 25.09.3"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Anki is a program for creating and reviewing flashcards. Prior to 25.09.3, Anki launches a local HTTP server to serve media files and web pages for parts of its interface, but requests from other origins were not sufficiently blocked. A malicious website could potentially trigger side-effecting requests to the local server, with severity varying by browser depending on Private Network Access protections. This issue is fixed in version 25.09.3."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 2.1,
            "baseSeverity": "LOW",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "ACTIVE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "LOW",
            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "LOW"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-346",
              "description": "CWE-346: Origin Validation Error",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-07T21:11:01.808Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/ankitects/anki/security/advisories/GHSA-869j-r97x-hx2g",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/ankitects/anki/security/advisories/GHSA-869j-r97x-hx2g"
        },
        {
          "name": "https://github.com/ankitects/anki/commit/858e5689d0e4fd24f74856c7e8f245412694a219",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/ankitects/anki/commit/858e5689d0e4fd24f74856c7e8f245412694a219"
        },
        {
          "name": "https://github.com/ankitects/anki/releases/tag/25.09.3",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/ankitects/anki/releases/tag/25.09.3"
        },
        {
          "name": "https://x.com/taviso/status/2051310678800253318",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://x.com/taviso/status/2051310678800253318"
        }
      ],
      "source": {
        "advisory": "GHSA-869j-r97x-hx2g",
        "discovery": "UNKNOWN"
      },
      "title": "Anki\u0027s local HTTP server does not sufficiently validate requests"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-59153",
    "datePublished": "2026-07-07T21:11:01.808Z",
    "dateReserved": "2026-07-02T16:50:27.886Z",
    "dateUpdated": "2026-07-08T13:50:15.783Z",
    "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

GHSA-869J-R97X-HX2G

Summary

Browser impact

Patches

CVE-2026-59153 (GCVE-0-2026-59153)

Tags

Sightings

Nomenclature