CVE Explorer

CVE-2026-41168

pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.1 can craft a PDF which leads to long runtimes. This requires cross-reference streams with wrong large `/Size` values or object streams with wrong large `/N` values. This has been fixed in pypdf 6.10.1. As a workaround, one may apply the changes from the patch manually.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:63c5b03ae1456b89693983db1f33417406f07f69fd705326413363932ad91052

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"pypdf","vendor":"py-pdf","versions":[{"status":"affected","version":"< 6.10.1"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:e44cce80b30376ee69b147114fe4e1444291ea15fc34e4e2d4bd5d3dac8a45cd · sha256:a4d572fed675566c… · /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:e44cce80b30376ee69b147114fe4e1444291ea15fc34e4e2d4bd5d3dac8a45cd · sha256:a4d572fed675566c… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion

{"cweId":"CWE-834","description":"CWE-834: Excessive Iteration","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:e44cce80b30376ee69b147114fe4e1444291ea15fc34e4e2d4bd5d3dac8a45cd · sha256:a4d572fed675566c… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions

{"name":"https://github.com/py-pdf/pypdf/commit/62338e9d36419cf193ccec7331784f45df1d70b3","tags":["x_refsource_MISC"],"url":"https://github.com/py-pdf/pypdf/commit/62338e9d36419cf193ccec7331784f45df1d70b3"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:e44cce80b30376ee69b147114fe4e1444291ea15fc34e4e2d4bd5d3dac8a45cd · sha256:a4d572fed675566c… · /containers/cna/references/2

{"name":"https://github.com/py-pdf/pypdf/pull/3733","tags":["x_refsource_MISC"],"url":"https://github.com/py-pdf/pypdf/pull/3733"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:e44cce80b30376ee69b147114fe4e1444291ea15fc34e4e2d4bd5d3dac8a45cd · sha256:a4d572fed675566c… · /containers/cna/references/1

{"name":"https://github.com/py-pdf/pypdf/releases/tag/6.10.1","tags":["x_refsource_MISC"],"url":"https://github.com/py-pdf/pypdf/releases/tag/6.10.1"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:e44cce80b30376ee69b147114fe4e1444291ea15fc34e4e2d4bd5d3dac8a45cd · sha256:a4d572fed675566c… · /containers/cna/references/3

{"name":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-jj6c-8h6c-hppx","tags":["x_refsource_CONFIRM"],"url":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-jj6c-8h6c-hppx"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:e44cce80b30376ee69b147114fe4e1444291ea15fc34e4e2d4bd5d3dac8a45cd · sha256:a4d572fed675566c… · /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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