GHSA-869J-R97X-HX2G

Vulnerability from github – Published: 2026-06-19 22:10 – Updated: 2026-07-15 21:58
VLAI
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. While the server has a CORS setup, requests from other origins were not blocked, allowing malicious websites to potentially trigger side-effecting requests.

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

References

https://x.com/taviso/status/2051310678800253318

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
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{
  "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": [
    "CVE-2026-59153"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22",
      "CWE-346"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-19T22:10:57Z",
    "nvd_published_at": "2026-07-07T22:16:54Z",
    "severity": "HIGH"
  },
  "details": "## Summary\n\nAnki launches a local HTTP server to serve media files and web pages for parts of its interface. While the server has a CORS setup, requests from other origins were not blocked, allowing malicious websites to potentially trigger side-effecting requests.\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\n\n### References\n\nhttps://x.com/taviso/status/2051310678800253318",
  "id": "GHSA-869j-r97x-hx2g",
  "modified": "2026-07-15T21:58:57Z",
  "published": "2026-06-19T22:10:57Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/ankitects/anki/security/advisories/GHSA-869j-r97x-hx2g"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-59153"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ankitects/anki/commit/858e5689d0e4fd24f74856c7e8f245412694a219"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/ankitects/anki"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ankitects/anki/releases/tag/25.09.3"
    },
    {
      "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"
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.