github - ghsa-j5cc-6rx8-ff96

GHSA-J5CC-6RX8-FF96

Vulnerability from github – Published: 2025-06-17 15:31 – Updated: 2025-07-07 18:32

Details

The html.parser.HTMLParser class had worse-case quadratic complexity when processing certain crafted malformed inputs potentially leading to amplified denial-of-service.

Severity ?

4.3 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2025-6069"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1333"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-06-17T14:15:33Z",
    "severity": "MODERATE"
  },
  "details": "The html.parser.HTMLParser class had worse-case quadratic complexity when processing certain crafted malformed inputs potentially leading to amplified denial-of-service.",
  "id": "GHSA-j5cc-6rx8-ff96",
  "modified": "2025-07-07T18:32:21Z",
  "published": "2025-06-17T15:31:08Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-6069"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/issues/135462"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/pull/135464"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/4455cbabf991e202185a25a631af206f60bbc949"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/6eb6c5dbfb528bd07d77b60fd71fd05d81d45c41"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/8d1b3dfa09135affbbf27fb8babcf3c11415df49"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/ab0893fd5c579d9cea30841680e6d35fc478afb5"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/d851f8e258c7328814943e923a7df81bca15df4b"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/f3c6f882cddc8dc30320d2e73edf019e201394fc"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/fdc9d214c01cb4588f540cfa03726bbf2a33fc15"
    },
    {
      "type": "WEB",
      "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/K5PIYLR6EP3WR7ZOKKYQUWEDNQVUXOYM"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2025-6069 (GCVE-0-2025-6069)

Vulnerability from cvelistv5 – Published: 2025-06-17 13:39 – Updated: 2025-10-09 18:37

Summary

The html.parser.HTMLParser class had worse-case quadratic complexity when processing certain crafted malformed inputs potentially leading to amplified denial-of-service.

Severity ?

4.3 (Medium)


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

CWE

CWE-1333 - Inefficient Regular Expression Complexity

Assigner

PSF

References

URL

Tags

	https://github.com/python/cpython/issues/135462	issue-tracking
	https://github.com/python/cpython/pull/135464	patch
	https://github.com/python/cpython/commit/4455cbab…	patch
	https://github.com/python/cpython/commit/6eb6c5db…	patch
	https://github.com/python/cpython/commit/d851f8e2…	patch
	https://mail.python.org/archives/list/security-an…	vendor-advisory
	https://github.com/python/cpython/commit/8d1b3dfa…	patch
	https://github.com/python/cpython/commit/ab0893fd…	patch
	https://github.com/python/cpython/commit/f3c6f882…	patch
	https://github.com/python/cpython/commit/fdc9d214…	patch

Impacted products

	Vendor	Product	Version
	Python Software Foundation	CPython	Affected: 0 , < 3.9.24 (python) Affected: 3.10.0 , < 3.10.19 (python) Affected: 3.11.0 , < 3.11.14 (python) Affected: 3.12.0 , < 3.12.12 (python) Affected: 3.13.0 , < 3.13.6 (python) Affected: 3.14.0a1 , < 3.14.0b3 (python)

Credits

Serhiy Storchaka Jake Howard sw0rd1ight

Show details on NVD website

JSON

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Sightings

Author	Source	Type	Date

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-J5CC-6RX8-FF96

CVE-2025-6069 (GCVE-0-2025-6069)

Tags

Sightings

Nomenclature