{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-55380","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-16T18:57:40.182Z","datePublished":"2026-07-06T18:50:14.789Z","dateUpdated":"2026-07-06T19:23:30.046Z"},"containers":{"cna":{"title":"Pillow GdImageFile decompression bomb protection bypass","problemTypes":[{"descriptions":[{"cweId":"CWE-789","lang":"en","description":"CWE-789: Memory Allocation with Excessive Size Value","type":"CWE"}]}],"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"}}],"references":[{"name":"https://github.com/python-pillow/Pillow/security/advisories/GHSA-phj9-mv4w-65pm","tags":["x_refsource_CONFIRM"],"url":"https://github.com/python-pillow/Pillow/security/advisories/GHSA-phj9-mv4w-65pm"},{"name":"https://github.com/python-pillow/Pillow/commit/f39b0ae6624eb2d7c5c5d651d9bb5fdbd96a8675","tags":["x_refsource_MISC"],"url":"https://github.com/python-pillow/Pillow/commit/f39b0ae6624eb2d7c5c5d651d9bb5fdbd96a8675"},{"name":"https://github.com/python-pillow/Pillow/blob/main/docs/releasenotes/12.3.0.rst","tags":["x_refsource_MISC"],"url":"https://github.com/python-pillow/Pillow/blob/main/docs/releasenotes/12.3.0.rst"}],"affected":[{"vendor":"python-pillow","product":"Pillow","versions":[{"version":"< 12.3.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-07-06T18:51:08.092Z"},"descriptions":[{"lang":"en","value":"Pillow is a Python imaging library. Prior to 12.3.0, PIL/GdImageFile.py GdImageFile._open() read image dimensions from the GD 2.x header and stored them in self._size without calling Image._decompression_bomb_check(), allowing a crafted .gd file to trigger excessive C-heap allocation when loaded. This issue is fixed in version 12.3.0."}],"source":{"advisory":"GHSA-phj9-mv4w-65pm","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/python-pillow/Pillow/security/advisories/GHSA-phj9-mv4w-65pm","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-06T19:23:03.405538Z","id":"CVE-2026-55380","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-07-06T19:23:30.046Z"}}]}}