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CVE-2026-59938

pypdf is a free and open-source pure-python PDF library. Prior to 6.14.0, an attacker can craft a PDF with declared image size values that are much too large compared to the actual data, causing large memory usage in pypdf image parsing. This issue is fixed in version 6.14.0.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:ff06436f17cd145bd138fdf02f4a3e01a32c9b246b5e31ba15e4adc728f69927
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"pypdf","vendor":"py-pdf","versions":[{"status":"affected","version":"< 6.14.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d11b88ad15ea7b252fa96c01cebd2ed5b482f9ec52c85087e343e92bf92d7233 · sha256:7a915e4087843791… · /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:d11b88ad15ea7b252fa96c01cebd2ed5b482f9ec52c85087e343e92bf92d7233 · sha256:7a915e4087843791… · /containers/cna/metrics/0/cvssV4_0

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:d11b88ad15ea7b252fa96c01cebd2ed5b482f9ec52c85087e343e92bf92d7233 · sha256:7a915e4087843791… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"name":"https://github.com/py-pdf/pypdf/commit/c64583be16b8e8763d8777075f8ecbf382014b7a","tags":["x_refsource_MISC"],"url":"https://github.com/py-pdf/pypdf/commit/c64583be16b8e8763d8777075f8ecbf382014b7a"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d11b88ad15ea7b252fa96c01cebd2ed5b482f9ec52c85087e343e92bf92d7233 · sha256:7a915e4087843791… · /containers/cna/references/2
{"name":"https://github.com/py-pdf/pypdf/pull/3888","tags":["x_refsource_MISC"],"url":"https://github.com/py-pdf/pypdf/pull/3888"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d11b88ad15ea7b252fa96c01cebd2ed5b482f9ec52c85087e343e92bf92d7233 · sha256:7a915e4087843791… · /containers/cna/references/1
{"name":"https://github.com/py-pdf/pypdf/releases/tag/6.14.0","tags":["x_refsource_MISC"],"url":"https://github.com/py-pdf/pypdf/releases/tag/6.14.0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d11b88ad15ea7b252fa96c01cebd2ed5b482f9ec52c85087e343e92bf92d7233 · sha256:7a915e4087843791… · /containers/cna/references/3
{"name":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-5qjq-93h5-hrgp","tags":["x_refsource_CONFIRM"],"url":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-5qjq-93h5-hrgp"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d11b88ad15ea7b252fa96c01cebd2ed5b482f9ec52c85087e343e92bf92d7233 · sha256:7a915e4087843791… · /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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