CVE Explorer

CVE-2026-40260

pypdf is a free and open-source pure-python PDF library. In versions prior to 6.10.0, manipulated XMP metadata entity declarations can exhaust RAM. An attacker who exploits this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the XMP metadata. This issue has been fixed in version 6.10.0.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:b3a86b85e5d3d062e479d02cbdc046f3b4300c7dbf49b60b3caeaad0bc8235d3

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"pypdf","vendor":"py-pdf","versions":[{"status":"affected","version":"< 6.10.0"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:1f70793def67af158570e61934fcd911f183b290f67076d7ae5ebe7dd1f5eaae · sha256:e84961f6aaf25f39… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":6.9,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:1f70793def67af158570e61934fcd911f183b290f67076d7ae5ebe7dd1f5eaae · sha256:e84961f6aaf25f39… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion

{"cweId":"CWE-776","description":"CWE-776: Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:1f70793def67af158570e61934fcd911f183b290f67076d7ae5ebe7dd1f5eaae · sha256:e84961f6aaf25f39… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions

{"name":"https://github.com/py-pdf/pypdf/commit/b15a374e5ca648d4878e57c3b2c0551e7f8cc7f8","tags":["x_refsource_MISC"],"url":"https://github.com/py-pdf/pypdf/commit/b15a374e5ca648d4878e57c3b2c0551e7f8cc7f8"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:1f70793def67af158570e61934fcd911f183b290f67076d7ae5ebe7dd1f5eaae · sha256:e84961f6aaf25f39… · /containers/cna/references/2

{"name":"https://github.com/py-pdf/pypdf/pull/3724","tags":["x_refsource_MISC"],"url":"https://github.com/py-pdf/pypdf/pull/3724"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:1f70793def67af158570e61934fcd911f183b290f67076d7ae5ebe7dd1f5eaae · sha256:e84961f6aaf25f39… · /containers/cna/references/1

{"name":"https://github.com/py-pdf/pypdf/releases/tag/6.10.0","tags":["x_refsource_MISC"],"url":"https://github.com/py-pdf/pypdf/releases/tag/6.10.0"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:1f70793def67af158570e61934fcd911f183b290f67076d7ae5ebe7dd1f5eaae · sha256:e84961f6aaf25f39… · /containers/cna/references/3

{"name":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-3crg-w4f6-42mx","tags":["x_refsource_CONFIRM"],"url":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-3crg-w4f6-42mx"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:1f70793def67af158570e61934fcd911f183b290f67076d7ae5ebe7dd1f5eaae · sha256:e84961f6aaf25f39… · /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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