CVE Explorer

CVE-2026-41312

pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.2 can craft a PDF which leads to the RAM being exhausted. This requires accessing a stream compressed using `/FlateDecode` with a `/Predictor` unequal 1 and large predictor parameters. This has been fixed in pypdf 6.10.2. As a workaround, one may apply the changes from the patch manually.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:6b67bf4cc555e491fae16a62ab00499309ddfc84b663cd7b3958ad57c06f11a2

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"pypdf","vendor":"py-pdf","versions":[{"status":"affected","version":"< 6.10.2"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:12a6c0fee7b9dacd10ec2f66f2e57d576cda4d416fac554e969fee2a679de318 · sha256:e906a3a237e07f95… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"LOCAL","baseScore":4.8,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/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:v2:12a6c0fee7b9dacd10ec2f66f2e57d576cda4d416fac554e969fee2a679de318 · sha256:e906a3a237e07f95… · /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:v2:12a6c0fee7b9dacd10ec2f66f2e57d576cda4d416fac554e969fee2a679de318 · sha256:e906a3a237e07f95… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions

{"name":"https://github.com/py-pdf/pypdf/commit/ac734dab4eef92bcce50d503949b4d9887d89f11","tags":["x_refsource_MISC"],"url":"https://github.com/py-pdf/pypdf/commit/ac734dab4eef92bcce50d503949b4d9887d89f11"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:12a6c0fee7b9dacd10ec2f66f2e57d576cda4d416fac554e969fee2a679de318 · sha256:e906a3a237e07f95… · /containers/cna/references/2

{"name":"https://github.com/py-pdf/pypdf/pull/3734","tags":["x_refsource_MISC"],"url":"https://github.com/py-pdf/pypdf/pull/3734"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:12a6c0fee7b9dacd10ec2f66f2e57d576cda4d416fac554e969fee2a679de318 · sha256:e906a3a237e07f95… · /containers/cna/references/1

{"name":"https://github.com/py-pdf/pypdf/releases/tag/6.10.2","tags":["x_refsource_MISC"],"url":"https://github.com/py-pdf/pypdf/releases/tag/6.10.2"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:12a6c0fee7b9dacd10ec2f66f2e57d576cda4d416fac554e969fee2a679de318 · sha256:e906a3a237e07f95… · /containers/cna/references/3

{"name":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-7gw9-cf7v-778f","tags":["x_refsource_CONFIRM"],"url":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-7gw9-cf7v-778f"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:12a6c0fee7b9dacd10ec2f66f2e57d576cda4d416fac554e969fee2a679de318 · sha256:e906a3a237e07f95… · /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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