CVE Explorer

CVE-2026-55380

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.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:752975ec649eb146a7e7b5bf557c604f0ea1ede0fe1a253943a530a65bfae8aa

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"Pillow","vendor":"python-pillow","versions":[{"status":"affected","version":"< 12.3.0"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:5774e0a47085645f7a945c40c039f2c9504a23c5549d21f0305b5eb355fcd3df · sha256:b52ccadd98590707… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"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"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:5774e0a47085645f7a945c40c039f2c9504a23c5549d21f0305b5eb355fcd3df · sha256:b52ccadd98590707… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-789","description":"CWE-789: Memory Allocation with Excessive Size Value","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:5774e0a47085645f7a945c40c039f2c9504a23c5549d21f0305b5eb355fcd3df · sha256:b52ccadd98590707… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions

{"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"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:5774e0a47085645f7a945c40c039f2c9504a23c5549d21f0305b5eb355fcd3df · sha256:b52ccadd98590707… · /containers/cna/references/2

{"name":"https://github.com/python-pillow/Pillow/commit/f39b0ae6624eb2d7c5c5d651d9bb5fdbd96a8675","tags":["x_refsource_MISC"],"url":"https://github.com/python-pillow/Pillow/commit/f39b0ae6624eb2d7c5c5d651d9bb5fdbd96a8675"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:5774e0a47085645f7a945c40c039f2c9504a23c5549d21f0305b5eb355fcd3df · sha256:b52ccadd98590707… · /containers/cna/references/1

{"tags":["exploit"],"url":"https://github.com/python-pillow/Pillow/security/advisories/GHSA-phj9-mv4w-65pm"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:5774e0a47085645f7a945c40c039f2c9504a23c5549d21f0305b5eb355fcd3df · sha256:b52ccadd98590707… · /containers/adp/0/references/0

{"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"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:5774e0a47085645f7a945c40c039f2c9504a23c5549d21f0305b5eb355fcd3df · sha256:b52ccadd98590707… · /containers/cna/references/0

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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