CVE Explorer

CVE-2026-24688

pypdf is a free and open-source pure-python PDF library. An attacker who uses an infinite loop vulnerability that is present in versions prior to 6.6.2 can craft a PDF which leads to an infinite loop. This requires accessing the outlines/bookmarks. This has been fixed in pypdf 6.6.2. If projects cannot upgrade yet, consider applying the changes from PR #3610 manually.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:fc893f18b9d62e92bb8a59b4f63bbcf0260775d60df2798f4d8fdf95af76c2a8

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"pypdf","vendor":"py-pdf","versions":[{"status":"affected","version":"< 6.6.2"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:8180c8ce6f968aa6d0b856c4a4a272d525f9409911ac04a2c8994433a9124924 · sha256:41a6995c03fe71fc… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"LOCAL","baseScore":5.1,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:L/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:v2:8180c8ce6f968aa6d0b856c4a4a272d525f9409911ac04a2c8994433a9124924 · sha256:41a6995c03fe71fc… · /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:v2:8180c8ce6f968aa6d0b856c4a4a272d525f9409911ac04a2c8994433a9124924 · sha256:41a6995c03fe71fc… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions

{"name":"https://github.com/py-pdf/pypdf/commit/b1282f8dcdc1a7b41ceab6740ffddfdf31b1fec1","tags":["x_refsource_MISC"],"url":"https://github.com/py-pdf/pypdf/commit/b1282f8dcdc1a7b41ceab6740ffddfdf31b1fec1"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:8180c8ce6f968aa6d0b856c4a4a272d525f9409911ac04a2c8994433a9124924 · sha256:41a6995c03fe71fc… · /containers/cna/references/2

{"name":"https://github.com/py-pdf/pypdf/pull/3610","tags":["x_refsource_MISC"],"url":"https://github.com/py-pdf/pypdf/pull/3610"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:8180c8ce6f968aa6d0b856c4a4a272d525f9409911ac04a2c8994433a9124924 · sha256:41a6995c03fe71fc… · /containers/cna/references/1

{"name":"https://github.com/py-pdf/pypdf/releases/tag/6.6.2","tags":["x_refsource_MISC"],"url":"https://github.com/py-pdf/pypdf/releases/tag/6.6.2"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:8180c8ce6f968aa6d0b856c4a4a272d525f9409911ac04a2c8994433a9124924 · sha256:41a6995c03fe71fc… · /containers/cna/references/3

{"name":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-2q4j-m29v-hq73","tags":["x_refsource_CONFIRM"],"url":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-2q4j-m29v-hq73"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:8180c8ce6f968aa6d0b856c4a4a272d525f9409911ac04a2c8994433a9124924 · sha256:41a6995c03fe71fc… · /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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