CVE Explorer

CVE-2026-33699

pypdf is a free and open-source pure-python PDF library. Versions prior to 6.9.2 have a vulnerability in which an attacker can craft a PDF which leads to an infinite loop. This requires reading a file in non-strict mode. This has been fixed in pypdf 6.9.2. If users cannot upgrade yet, consider applying the changes from the patch manually.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:7db137571d4dfa9298ec827525482b8937685cc2136aadd8e10b76ce908a21f0

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"pypdf","vendor":"py-pdf","versions":[{"status":"affected","version":"< 6.9.2"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:85032ee91dab8e8d98e99cdb25edb3c6277a3ce9008bdc579f18112e603033c9 · sha256:6c4f1e9c6380e70e… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":4.6,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:85032ee91dab8e8d98e99cdb25edb3c6277a3ce9008bdc579f18112e603033c9 · sha256:6c4f1e9c6380e70e… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion

{"cweId":"CWE-835","description":"CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:85032ee91dab8e8d98e99cdb25edb3c6277a3ce9008bdc579f18112e603033c9 · sha256:6c4f1e9c6380e70e… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions

{"name":"https://github.com/py-pdf/pypdf/pull/3693","tags":["x_refsource_MISC"],"url":"https://github.com/py-pdf/pypdf/pull/3693"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:85032ee91dab8e8d98e99cdb25edb3c6277a3ce9008bdc579f18112e603033c9 · sha256:6c4f1e9c6380e70e… · /containers/cna/references/1

{"name":"https://github.com/py-pdf/pypdf/releases/tag/6.9.2","tags":["x_refsource_MISC"],"url":"https://github.com/py-pdf/pypdf/releases/tag/6.9.2"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:85032ee91dab8e8d98e99cdb25edb3c6277a3ce9008bdc579f18112e603033c9 · sha256:6c4f1e9c6380e70e… · /containers/cna/references/2

{"name":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-87mj-5ggw-8qc3","tags":["x_refsource_CONFIRM"],"url":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-87mj-5ggw-8qc3"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:85032ee91dab8e8d98e99cdb25edb3c6277a3ce9008bdc579f18112e603033c9 · sha256:6c4f1e9c6380e70e… · /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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