FKIE_CVE-2025-11468

Vulnerability from fkie_nvd - Published: 2026-01-20 22:15 - Updated: 2026-04-15 00:35
Severity ?
5.7 (Medium) - CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Summary
When folding a long comment in an email header containing exclusively unfoldable characters, the parenthesis would not be preserved. This could be used for injecting headers into email messages where addresses are user-controlled and not sanitized.
References
cna@python.orghttps://github.com/python/cpython/commit/003b8315669b9f08b1010a49071f73f15f818094
cna@python.orghttps://github.com/python/cpython/commit/17d1490aa97bd6b98a42b1a9b324ead84e7fd8a2
cna@python.orghttps://github.com/python/cpython/commit/61614a5e5056e4f61ced65008d4576f3df34acb6
cna@python.orghttps://github.com/python/cpython/commit/a76e4cd62dd68e7cbe86e37e6ed988495a646b66
cna@python.orghttps://github.com/python/cpython/commit/e9970f077240c7c670e8a6fc6662f2b30d3b6ad0
cna@python.orghttps://github.com/python/cpython/commit/f738386838021c762efea6c9802c82de65e87796
cna@python.orghttps://github.com/python/cpython/issues/143935
cna@python.orghttps://github.com/python/cpython/pull/143936
cna@python.orghttps://mail.python.org/archives/list/security-announce@python.org/thread/FELSEOLBI2QR6YLG6Q7VYF7FWSGQTKLI/
Impacted products
Vendor Product Version
To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "When folding a long comment in an email header containing exclusively unfoldable characters, the parenthesis would not be preserved. This could be used for injecting headers into email messages where addresses are user-controlled and not sanitized."
    },
    {
      "lang": "es",
      "value": "Al plegar un comentario largo en una cabecera de correo electr\u00f3nico que contiene exclusivamente caracteres no plegables, el par\u00e9ntesis no se conservar\u00eda. Esto podr\u00eda usarse para inyectar cabeceras en mensajes de correo electr\u00f3nico donde las direcciones son controladas por el usuario y no est\u00e1n saneadas."
    }
  ],
  "id": "CVE-2025-11468",
  "lastModified": "2026-04-15T00:35:42.020",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "PRESENT",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 5.7,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "HIGH",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "PASSIVE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:N/VI:H/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "cna@python.org",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-01-20T22:15:50.690",
  "references": [
    {
      "source": "cna@python.org",
      "url": "https://github.com/python/cpython/commit/003b8315669b9f08b1010a49071f73f15f818094"
    },
    {
      "source": "cna@python.org",
      "url": "https://github.com/python/cpython/commit/17d1490aa97bd6b98a42b1a9b324ead84e7fd8a2"
    },
    {
      "source": "cna@python.org",
      "url": "https://github.com/python/cpython/commit/61614a5e5056e4f61ced65008d4576f3df34acb6"
    },
    {
      "source": "cna@python.org",
      "url": "https://github.com/python/cpython/commit/a76e4cd62dd68e7cbe86e37e6ed988495a646b66"
    },
    {
      "source": "cna@python.org",
      "url": "https://github.com/python/cpython/commit/e9970f077240c7c670e8a6fc6662f2b30d3b6ad0"
    },
    {
      "source": "cna@python.org",
      "url": "https://github.com/python/cpython/commit/f738386838021c762efea6c9802c82de65e87796"
    },
    {
      "source": "cna@python.org",
      "url": "https://github.com/python/cpython/issues/143935"
    },
    {
      "source": "cna@python.org",
      "url": "https://github.com/python/cpython/pull/143936"
    },
    {
      "source": "cna@python.org",
      "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/FELSEOLBI2QR6YLG6Q7VYF7FWSGQTKLI/"
    }
  ],
  "sourceIdentifier": "cna@python.org",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-93"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




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.