CVE Explorer

CVE-2026-55379

Pillow is a Python imaging library. Prior to 12.3.0, PIL/BdfFontFile.py bdf_char() read the BBX width and height field from a BDF font file and passed attacker-controlled dimensions to Image.new() without calling Image._decompression_bomb_check(), bypassing Pillow's documented decompression bomb protection and allowing excessive memory allocation. This issue is fixed in version 12.3.0.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:633f27e1ec4c13316bccbf5e901d5772364ed3fa4b842a2535e5bcc20e2aa126

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:v2:8c260d94a7db7ecf8e0fab57d0d910dd9ff7b8d3fd46d8411c376a895155be72 · sha256:d758e952a8b60239… · /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:v2:8c260d94a7db7ecf8e0fab57d0d910dd9ff7b8d3fd46d8411c376a895155be72 · sha256:d758e952a8b60239… · /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:v2:8c260d94a7db7ecf8e0fab57d0d910dd9ff7b8d3fd46d8411c376a895155be72 · sha256:d758e952a8b60239… · /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:v2:8c260d94a7db7ecf8e0fab57d0d910dd9ff7b8d3fd46d8411c376a895155be72 · sha256:d758e952a8b60239… · /containers/cna/references/2

{"name":"https://github.com/python-pillow/Pillow/commit/0a263e6264aa5399988d9acd3bbfbca2ca3ec77d","tags":["x_refsource_MISC"],"url":"https://github.com/python-pillow/Pillow/commit/0a263e6264aa5399988d9acd3bbfbca2ca3ec77d"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:8c260d94a7db7ecf8e0fab57d0d910dd9ff7b8d3fd46d8411c376a895155be72 · sha256:d758e952a8b60239… · /containers/cna/references/1

{"name":"https://github.com/python-pillow/Pillow/security/advisories/GHSA-45hq-cxwh-f6vc","tags":["x_refsource_CONFIRM"],"url":"https://github.com/python-pillow/Pillow/security/advisories/GHSA-45hq-cxwh-f6vc"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:8c260d94a7db7ecf8e0fab57d0d910dd9ff7b8d3fd46d8411c376a895155be72 · sha256:d758e952a8b60239… · /containers/cna/references/0

{"tags":["exploit"],"url":"https://github.com/python-pillow/Pillow/security/advisories/GHSA-45hq-cxwh-f6vc"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:8c260d94a7db7ecf8e0fab57d0d910dd9ff7b8d3fd46d8411c376a895155be72 · sha256:d758e952a8b60239… · /containers/adp/0/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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