Vulnerability-Lookup

CERTFR-2026-AVI-0302

Vulnerability from certfr_avis - Published: 2026-03-17 - Updated: 2026-03-17

De multiples vulnérabilités ont été découvertes dans Python. Elles permettent à un attaquant de provoquer un contournement de la politique de sécurité et un problème de sécurité non spécifié par l'éditeur.

Solutions

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

Impacted products

	Vendor	Product	Description
	Python	CPython	CPython sans le dernier correctif de sécurité

References

Title

Publication Time

Tags

Bulletin de sécurité Python H6CADMBCDRFGWCMOXWUIHFJNV43GABJ7	2026-03-16	vendor-advisory
Bulletin de sécurité Python 5M7CGUW3XBRY7II4DK43KF7NQQ3TPZ6R	2026-03-16	vendor-advisory

Show details on source website

JSON

To clipboard

{
  "$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
  "affected_systems": [
    {
      "description": "CPython sans le dernier correctif de s\u00e9curit\u00e9",
      "product": {
        "name": "CPython",
        "vendor": {
          "name": "Python",
          "scada": false
        }
      }
    }
  ],
  "affected_systems_content": "",
  "content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
  "cves": [
    {
      "name": "CVE-2026-4224",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-4224"
    },
    {
      "name": "CVE-2026-3644",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-3644"
    }
  ],
  "initial_release_date": "2026-03-17T00:00:00",
  "last_revision_date": "2026-03-17T00:00:00",
  "links": [],
  "reference": "CERTFR-2026-AVI-0302",
  "revisions": [
    {
      "description": "Version initiale",
      "revision_date": "2026-03-17T00:00:00.000000"
    }
  ],
  "risks": [
    {
      "description": "Non sp\u00e9cifi\u00e9 par l\u0027\u00e9diteur"
    },
    {
      "description": "Contournement de la politique de s\u00e9curit\u00e9"
    }
  ],
  "summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans Python. Elles permettent \u00e0 un attaquant de provoquer un contournement de la politique de s\u00e9curit\u00e9 et un probl\u00e8me de s\u00e9curit\u00e9 non sp\u00e9cifi\u00e9 par l\u0027\u00e9diteur.",
  "title": "Multiples vuln\u00e9rabilit\u00e9s dans Python",
  "vendor_advisories": [
    {
      "published_at": "2026-03-16",
      "title": "Bulletin de s\u00e9curit\u00e9 Python H6CADMBCDRFGWCMOXWUIHFJNV43GABJ7",
      "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/H6CADMBCDRFGWCMOXWUIHFJNV43GABJ7/"
    },
    {
      "published_at": "2026-03-16",
      "title": "Bulletin de s\u00e9curit\u00e9 Python 5M7CGUW3XBRY7II4DK43KF7NQQ3TPZ6R",
      "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/5M7CGUW3XBRY7II4DK43KF7NQQ3TPZ6R/"
    }
  ]
}

CVE-2026-3644 (GCVE-0-2026-3644)

Vulnerability from cvelistv5 – Published: 2026-03-16 17:37 – Updated: 2026-03-16 18:25

Title

Incomplete control character validation in http.cookies

Summary

The fix for CVE-2026-0672, which rejected control characters in http.cookies.Morsel, was incomplete. The Morsel.update(), |= operator, and unpickling paths were not patched, allowing control characters to bypass input validation. Additionally, BaseCookie.js_output() lacked the output validation applied to BaseCookie.output().

Severity ?

6 (Medium)


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

CWE

CWE-20 - Improper Input Validation
CWE-116 - Improper Encoding or Escaping of Output

Assigner

PSF

References

URL

Tags

	https://mail.python.org/archives/list/security-an…	vendor-advisory
	https://github.com/python/cpython/commit/57e88c1c…	patch
	https://github.com/python/cpython/issues/145599	issue-tracking
	https://github.com/python/cpython/pull/145600	patch
	https://github.com/python/cpython/commit/62ceb396…	patch
	https://github.com/python/cpython/commit/d16ecc6c…	patch

Impacted products

	Vendor	Product	Version
	Python Software Foundation	CPython	Affected: 0 , < 3.15.0 (python)

Credits

Stan Ulbrych Stan Ulbrych Victor Stinner Seth Larson Vyom Yadav

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-3644",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-16T18:25:27.051552Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-20",
                "description": "CWE-20 Improper Input Validation",
                "lang": "en",
                "type": "CWE"
              }
            ]
          },
          {
            "descriptions": [
              {
                "cweId": "CWE-116",
                "description": "CWE-116 Improper Encoding or Escaping of Output",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-16T18:25:55.021Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "modules": [
            "http.cookies"
          ],
          "product": "CPython",
          "repo": "https://github.com/python/cpython",
          "vendor": "Python Software Foundation",
          "versions": [
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              "status": "affected",
              "version": "0",
              "versionType": "python"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "coordinator",
          "value": "Stan Ulbrych"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Stan Ulbrych"
        },
        {
          "lang": "en",
          "type": "remediation reviewer",
          "value": "Victor Stinner"
        },
        {
          "lang": "en",
          "type": "remediation reviewer",
          "value": "Seth Larson"
        },
        {
          "lang": "en",
          "type": "reporter",
          "value": "Vyom Yadav"
        }
      ],
      "descriptions": [
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          "supportingMedia": [
            {
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            }
          ],
          "value": "The fix for CVE-2026-0672, which rejected control characters in http.cookies.Morsel, was incomplete. The Morsel.update(), |= operator, and unpickling paths were not patched, allowing control characters to bypass input validation. Additionally, BaseCookie.js_output() lacked the output validation applied to BaseCookie.output()."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 6,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "LOW",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-16T17:45:23.093Z",
        "orgId": "28c92f92-d60d-412d-b760-e73465c3df22",
        "shortName": "PSF"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/H6CADMBCDRFGWCMOXWUIHFJNV43GABJ7/"
        },
        {
          "tags": [
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          ],
          "url": "https://github.com/python/cpython/commit/57e88c1cf95e1481b94ae57abe1010469d47a6b4"
        },
        {
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/python/cpython/issues/145599"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/pull/145600"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/commit/62ceb396fcbe69da1ded3702de586f4072b590dd"
        },
        {
          "tags": [
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          ],
          "url": "https://github.com/python/cpython/commit/d16ecc6c3626f0e2cc8f08c309c83934e8a979dd"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Incomplete control character validation in http.cookies",
      "x_generator": {
        "engine": "Vulnogram 1.0.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "28c92f92-d60d-412d-b760-e73465c3df22",
    "assignerShortName": "PSF",
    "cveId": "CVE-2026-3644",
    "datePublished": "2026-03-16T17:37:31.344Z",
    "dateReserved": "2026-03-06T16:13:09.289Z",
    "dateUpdated": "2026-03-16T18:25:55.021Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-4224 (GCVE-0-2026-4224)

Vulnerability from cvelistv5 – Published: 2026-03-16 17:52 – Updated: 2026-03-16 23:08

Title

Stack overflow parsing XML with deeply nested DTD content models

Summary

When an Expat parser with a registered ElementDeclHandler parses an inline document type definition containing a deeply nested content model a C stack overflow occurs.

Severity ?

6 (Medium)


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

CWE

CWE-674 - Uncontrolled Recursion

Assigner

PSF

References

URL

Tags

	https://github.com/python/cpython/commit/eb0e8be3…	patch
	https://mail.python.org/archives/list/security-an…	vendor-advisory
	https://github.com/python/cpython/issues/145986	issue-tracking
	https://github.com/python/cpython/pull/145987	patch
	https://github.com/python/cpython/commit/196edfb0…	patch
	https://github.com/python/cpython/commit/e0a8a6da…	patch

Impacted products

	Vendor	Product	Version
	Python Software Foundation	CPython	Affected: 0 , < 3.15.0 (python)

Credits

Gil Portnoy Stan Ulbrych Bénédikt Tran Stan Ulbrych

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-4224",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-16T18:20:48.548008Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-674",
                "description": "CWE-674 Uncontrolled Recursion",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-16T18:21:11.567Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2026-03-16T23:08:21.692Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/03/16/4"
          }
        ],
        "title": "CVE Program Container"
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    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "CPython",
          "repo": "https://github.com/python/cpython",
          "vendor": "Python Software Foundation",
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          "type": "remediation developer",
          "value": "Stan Ulbrych"
        },
        {
          "lang": "en",
          "type": "remediation reviewer",
          "value": "B\u00e9n\u00e9dikt Tran"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "Stan Ulbrych"
        }
      ],
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          ],
          "value": "When an Expat parser with a registered ElementDeclHandler parses an inline\ndocument type definition containing a deeply nested content model a C stack\noverflow occurs."
        }
      ],
      "metrics": [
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            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 6,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "LOW",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
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          "url": "https://github.com/python/cpython/commit/eb0e8be3a7e11b87d198a2c3af1ed0eccf532768"
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          "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/5M7CGUW3XBRY7II4DK43KF7NQQ3TPZ6R/"
        },
        {
          "tags": [
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          ],
          "url": "https://github.com/python/cpython/issues/145986"
        },
        {
          "tags": [
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          ],
          "url": "https://github.com/python/cpython/pull/145987"
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          "url": "https://github.com/python/cpython/commit/e0a8a6da90597a924b300debe045cdb4628ee1f3"
        }
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      "source": {
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    "assignerShortName": "PSF",
    "cveId": "CVE-2026-4224",
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    "dateReserved": "2026-03-15T18:10:54.886Z",
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Tags

Taxonomy of the tags.

All sightings related to this event Export sightings related to this event

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

CERTFR-2026-AVI-0302

Solutions

CVE-2026-3644 (GCVE-0-2026-3644)

CVE-2026-4224 (GCVE-0-2026-4224)

Tags

Sightings

Nomenclature