CVE-2026-59205 (GCVE-0-2026-59205)

Vulnerability from cvelistv5 – Published: 2026-07-14 15:48 – Updated: 2026-07-14 17:31
VLAI
Title
Pillow: Controlled heap out-of-bounds write in `ImageCmsTransform.apply()` via output mode mismatch
Summary
Pillow is a Python imaging library. Prior to 12.3.0, Pillow's ImageCms.ImageCmsTransform.apply(im, imOut) API can trigger controlled native heap corruption when the caller supplies an output image whose mode does not match the transform's declared output mode. This issue is fixed in version 12.3.0.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
python-pillow Pillow Affected: < 12.3.0
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-59205",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-14T17:30:37.376489Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-14T17:31:36.064Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/python-pillow/Pillow/security/advisories/GHSA-9hw9-ch79-4vh6"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Pillow",
          "vendor": "python-pillow",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 12.3.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Pillow is a Python imaging library. Prior to 12.3.0, Pillow\u0027s ImageCms.ImageCmsTransform.apply(im, imOut) API can trigger controlled native heap corruption when the caller supplies an output image whose mode does not match the transform\u0027s declared output mode. This issue is fixed in version 12.3.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-787",
              "description": "CWE-787: Out-of-bounds Write",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-14T15:48:39.962Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/python-pillow/Pillow/security/advisories/GHSA-9hw9-ch79-4vh6",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/python-pillow/Pillow/security/advisories/GHSA-9hw9-ch79-4vh6"
        },
        {
          "name": "https://github.com/python-pillow/Pillow/pull/9715",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/python-pillow/Pillow/pull/9715"
        },
        {
          "name": "https://github.com/python-pillow/Pillow/commit/a9ffc42bedf4fc0a7ef8d6486e7f9e81e3397721",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/python-pillow/Pillow/commit/a9ffc42bedf4fc0a7ef8d6486e7f9e81e3397721"
        },
        {
          "name": "https://github.com/python-pillow/Pillow/releases/tag/12.3.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/python-pillow/Pillow/releases/tag/12.3.0"
        }
      ],
      "source": {
        "advisory": "GHSA-9hw9-ch79-4vh6",
        "discovery": "UNKNOWN"
      },
      "title": "Pillow: Controlled heap out-of-bounds write in `ImageCmsTransform.apply()` via output mode mismatch"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-59205",
    "datePublished": "2026-07-14T15:48:39.962Z",
    "dateReserved": "2026-07-02T21:05:02.924Z",
    "dateUpdated": "2026-07-14T17:31:36.064Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-59205",
      "date": "2026-07-21",
      "epss": "0.0039",
      "percentile": "0.31407"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-59205\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-07-14T16:17:02.370\",\"lastModified\":\"2026-07-14T20:09:27.770\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Pillow is a Python imaging library. Prior to 12.3.0, Pillow\u0027s ImageCms.ImageCmsTransform.apply(im, imOut) API can trigger controlled native heap corruption when the caller supplies an output image whose mode does not match the transform\u0027s declared output mode. This issue is fixed in version 12.3.0.\"}],\"affected\":[{\"source\":\"security-advisories@github.com\",\"affectedData\":[{\"vendor\":\"python-pillow\",\"product\":\"Pillow\",\"versions\":[{\"version\":\"\u003c 12.3.0\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-07-14T17:30:37.376489Z\",\"id\":\"CVE-2026-59205\",\"options\":[{\"exploitation\":\"poc\"},{\"automatable\":\"yes\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-787\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"12.3.0\",\"matchCriteriaId\":\"6372231F-529B-45CD-978E-3F2AEFF5F95C\"}]}]}],\"references\":[{\"url\":\"https://github.com/python-pillow/Pillow/commit/a9ffc42bedf4fc0a7ef8d6486e7f9e81e3397721\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Patch\"]},{\"url\":\"https://github.com/python-pillow/Pillow/pull/9715\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Issue Tracking\",\"Patch\"]},{\"url\":\"https://github.com/python-pillow/Pillow/releases/tag/12.3.0\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Release Notes\"]},{\"url\":\"https://github.com/python-pillow/Pillow/security/advisories/GHSA-9hw9-ch79-4vh6\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Exploit\",\"Vendor Advisory\"]},{\"url\":\"https://github.com/python-pillow/Pillow/security/advisories/GHSA-9hw9-ch79-4vh6\",\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"tags\":[\"Exploit\",\"Vendor Advisory\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-07-21T21:11:21+00:00",
      "cve": "CVE-2026-59205",
      "id": "CVE-2026-59205",
      "initial_release_date": "2026-07-14T15:48:39.962000+00:00",
      "product_status:known_affected": "65",
      "product_status:known_not_affected": "4",
      "product_status:under_investigation": "22",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "Pillow: Pillow: Controlled native heap corruption in ImageCms.ImageCmsTransform.apply API",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-59205.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-17T12:55:48Z",
      "cve": "CVE-2026-59205",
      "id": "CVE-2026-59205",
      "initial_release_date": "2026-07-15T18:48:11Z",
      "product_status:first_fixed": "32",
      "product_status:known_affected": "49",
      "product_status:recommended": "1",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-59205",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-59205.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-59205\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-07-14T17:30:37.376489Z\"}}}], \"references\": [{\"url\": \"https://github.com/python-pillow/Pillow/security/advisories/GHSA-9hw9-ch79-4vh6\", \"tags\": [\"exploit\"]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-07-14T17:30:28.781Z\"}}], \"cna\": {\"title\": \"Pillow: Controlled heap out-of-bounds write in `ImageCmsTransform.apply()` via output mode mismatch\", \"source\": {\"advisory\": \"GHSA-9hw9-ch79-4vh6\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.5, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"python-pillow\", \"product\": \"Pillow\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003c 12.3.0\"}]}], \"references\": [{\"url\": \"https://github.com/python-pillow/Pillow/security/advisories/GHSA-9hw9-ch79-4vh6\", \"name\": \"https://github.com/python-pillow/Pillow/security/advisories/GHSA-9hw9-ch79-4vh6\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/python-pillow/Pillow/pull/9715\", \"name\": \"https://github.com/python-pillow/Pillow/pull/9715\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/python-pillow/Pillow/commit/a9ffc42bedf4fc0a7ef8d6486e7f9e81e3397721\", \"name\": \"https://github.com/python-pillow/Pillow/commit/a9ffc42bedf4fc0a7ef8d6486e7f9e81e3397721\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/python-pillow/Pillow/releases/tag/12.3.0\", \"name\": \"https://github.com/python-pillow/Pillow/releases/tag/12.3.0\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Pillow is a Python imaging library. Prior to 12.3.0, Pillow\u0027s ImageCms.ImageCmsTransform.apply(im, imOut) API can trigger controlled native heap corruption when the caller supplies an output image whose mode does not match the transform\u0027s declared output mode. This issue is fixed in version 12.3.0.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-787\", \"description\": \"CWE-787: Out-of-bounds Write\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-07-14T15:48:39.962Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-59205\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-14T17:31:36.064Z\", \"dateReserved\": \"2026-07-02T21:05:02.924Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-07-14T15:48:39.962Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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.