CVE Explorer

CVE-2026-28351

pypdf is a free and open-source pure-python PDF library. Prior to version 6.7.4, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the content stream using the RunLengthDecode filter. This has been fixed in pypdf 6.7.4. As a workaround, consider applying the changes from PR #3664.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:8fa1713545da1be72d112759a5349625ce7e82edc1023b89ddcb8a66c9d47d36

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"pypdf","vendor":"py-pdf","versions":[{"status":"affected","version":"< 6.7.4"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:c254f13f56fc77fb3e7d332189c4e83468575c5f1e4a80e2f2f2939afee41b5e · sha256:158867b59834cedd… · /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:c254f13f56fc77fb3e7d332189c4e83468575c5f1e4a80e2f2f2939afee41b5e · sha256:158867b59834cedd… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion

{"cweId":"CWE-400","description":"CWE-400: Uncontrolled Resource Consumption","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:c254f13f56fc77fb3e7d332189c4e83468575c5f1e4a80e2f2f2939afee41b5e · sha256:158867b59834cedd… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions

{"name":"https://github.com/py-pdf/pypdf/commit/f309c6003746414dc7b5048c19e6d879ff2dc858","tags":["x_refsource_MISC"],"url":"https://github.com/py-pdf/pypdf/commit/f309c6003746414dc7b5048c19e6d879ff2dc858"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:c254f13f56fc77fb3e7d332189c4e83468575c5f1e4a80e2f2f2939afee41b5e · sha256:158867b59834cedd… · /containers/cna/references/2

{"name":"https://github.com/py-pdf/pypdf/pull/3664","tags":["x_refsource_MISC"],"url":"https://github.com/py-pdf/pypdf/pull/3664"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:c254f13f56fc77fb3e7d332189c4e83468575c5f1e4a80e2f2f2939afee41b5e · sha256:158867b59834cedd… · /containers/cna/references/1

{"name":"https://github.com/py-pdf/pypdf/releases/tag/6.7.4","tags":["x_refsource_MISC"],"url":"https://github.com/py-pdf/pypdf/releases/tag/6.7.4"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:c254f13f56fc77fb3e7d332189c4e83468575c5f1e4a80e2f2f2939afee41b5e · sha256:158867b59834cedd… · /containers/cna/references/3

{"name":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-f2v5-7jq9-h8cg","tags":["x_refsource_CONFIRM"],"url":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-f2v5-7jq9-h8cg"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:c254f13f56fc77fb3e7d332189c4e83468575c5f1e4a80e2f2f2939afee41b5e · sha256:158867b59834cedd… · /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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