Denial Of Service

pypdf is vulnerable to Denial of Service. The vulnerability is due to a malformed /FlateDecode stream, where the byte-by-byte decompression is used, and an attacker can craft a PDF which leads to long runtimes...

Infinite Loop

pypdf is vulnerable to Infinite Loop. The vulnerability is due to the library's handling of circular /Prev entries in cross-reference streams, where an attacker can craft a PDF that leads to an infinite loop when read, allowing for a denial of service attack...

agentc-llamaindex (0.2.5a2), agentia (>=0.0.2, <=0.0.10) +243 more potentially affected by CVE-2026-28351 via pypdf (5.9.0)

pypdf PYPI version 5.9.0 is affected by a known vulnerability. The following packages have a transitive dependency on pypdf and may be impacted: - agentc-llamaindex 0.2.5a2 - agentia =0.0.2, =0.0.1, =0.1.4, =0.1.0a0.dev0, =0.2.0a0, =1.1.0a20250429, =3.1.8, =1.0.5, =1.0.0, =0.1.0, =1.1.1, =1.4.2,...

assert-files (>=0.1.0, <=0.1.3), vpplib (0.0.4) +1 more potentially affected by CVE-2026-28351 via pypdf (3.16.4)

pypdf PYPI version 3.16.4 is affected by a known vulnerability. The following packages have a transitive dependency on pypdf and may be impacted: - assert-files =0.1.0, =0.61.0, =0.65.0 Source cves: CVE-2026-28351 Source advisory: OSV:GHSA-F2V5-7JQ9-H8CG...

py40kie (>=0.1.0, <=0.2.2) potentially affected by CVE-2026-28351 via pypdf (3.12.2)

pypdf PYPI version 3.12.2 is affected by a known vulnerability. The following packages have a transitive dependency on pypdf and may be impacted: - py40kie =0.1.0, =0.2.2 Source cves: CVE-2026-28351 Source advisory: OSV:GHSA-F2V5-7JQ9-H8CG...

a-data-processing (0.0.1), ab-data-processing (0.0.1) +9 more potentially affected by CVE-2026-28351 via pypdf (3.17.1)

pypdf PYPI version 3.17.1 is affected by a known vulnerability. The following packages have a transitive dependency on pypdf and may be impacted: - a-data-processing 0.0.1 - ab-data-processing 0.0.1 - arac 0.0.1 - crate-anon 0.20.7 - generalagent =0.0.6, =0.0.1, =0.1.0, =0.0.1, =0.0.14 - pyxreade...

smart-pdf (2023.9.11.1) potentially affected by CVE-2026-28351 via pypdf (3.16.0)

pypdf PYPI version 3.16.0 is affected by a known vulnerability. The following packages have a transitive dependency on pypdf and may be impacted: - smart-pdf 2023.9.11.1 Source cves: CVE-2026-28351 Source advisory: OSV:GHSA-F2V5-7JQ9-H8CG...

pdfmerge (1.0.0), ribometric (>=0.1.4, <=0.1.12) potentially affected by CVE-2026-28351 via pypdf (3.9.0)

pypdf PYPI version 3.9.0 is affected by a known vulnerability. The following packages have a transitive dependency on pypdf and may be impacted: - pdfmerge 1.0.0 - ribometric =0.1.4, =0.1.12 Source cves: CVE-2026-28351 Source advisory: OSV:GHSA-F2V5-7JQ9-H8CG...

pretix (>=4.17.0, <=4.17.1), providentia (2.4.0) potentially affected by CVE-2026-28351 via pypdf (3.4.1)

pypdf PYPI version 3.4.1 is affected by a known vulnerability. The following packages have a transitive dependency on pypdf and may be impacted: - pretix =4.17.0, =4.17.1 - providentia 2.4.0 Source cves: CVE-2026-28351 Source advisory: OSV:GHSA-F2V5-7JQ9-H8CG...

chellow (>=1679494175.0.0, <=1688376223.0.0), pretix (>=4.18.0, <=4.18.2.post1) potentially affected by CVE-2026-28351 via pypdf (3.6.0)

pypdf PYPI version 3.6.0 is affected by a known vulnerability. The following packages have a transitive dependency on pypdf and may be impacted: - chellow =1679494175.0.0, =4.18.0, =4.18.2.post1 Source cves: CVE-2026-28351 Source advisory: OSV:GHSA-F2V5-7JQ9-H8CG...

iiiflow (>=0.1.0, <=1.3.2), mayan-edms (>=4.5.0, <=4.5.8) potentially affected by CVE-2026-28351 via pypdf (3.14.0)

pypdf PYPI version 3.14.0 is affected by a known vulnerability. The following packages have a transitive dependency on pypdf and may be impacted: - iiiflow =0.1.0, =4.5.0, =4.5.8 Source cves: CVE-2026-28351 Source advisory: OSV:GHSA-F2V5-7JQ9-H8CG...

EUVD-2026-9070

pypdf: Manipulated RunLengthDecode streams can exhaust RAM...

pymorant (>=1.0.145, <=1.0.156) potentially affected by CVE-2026-28351 via pypdf (3.16.1)

pypdf PYPI version 3.16.1 is affected by a known vulnerability. The following packages have a transitive dependency on pypdf and may be impacted: - pymorant =1.0.145, =1.0.156 Source cves: CVE-2026-28351 Source advisory: OSV:GHSA-F2V5-7JQ9-H8CG...

ai-enterprise-agent (>=0.0.4, <=0.0.9), almax-common (>=1.0.5.dev20240601224039, <=1.0.7.dev20240801212517) +25 more potentially affected by CVE-2026-28351 via pypdf (4.2.0)

pypdf PYPI version 4.2.0 is affected by a known vulnerability. The following packages have a transitive dependency on pypdf and may be impacted: - ai-enterprise-agent =0.0.4, =1.0.5.dev20240601224039, =2024.7.4, =0.6.22, =0.2.1, =0.2.0, =0.0.5, =0.2.1, =3.3.2, =0.1.0, =0.0.1, =4.7.1, =0.1.0, =0.1...

bondai (>=0.1.0, <=0.3.0b2) potentially affected by CVE-2026-28351 via pypdf (3.15.1)

pypdf PYPI version 3.15.1 is affected by a known vulnerability. The following packages have a transitive dependency on pypdf and may be impacted: - bondai =0.1.0, =0.3.0b2 Source cves: CVE-2026-28351 Source advisory: OSV:GHSA-F2V5-7JQ9-H8CG...

calibreweb (0.6.20) potentially affected by CVE-2026-28351 via pypdf (3.5.2)

pypdf PYPI version 3.5.2 is affected by a known vulnerability. The following packages have a transitive dependency on pypdf and may be impacted: - calibreweb 0.6.20 Source cves: CVE-2026-28351 Source advisory: OSV:GHSA-F2V5-7JQ9-H8CG...

GHSA-F2V5-7JQ9-H8CG pypdf: Manipulated RunLengthDecode streams can exhaust RAM

Impact 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. Patches This has been fixed in pypdf==6.7.4. Workarounds If you cannot upgrade yet, consider applying the changes from PR 36...

agatta (>=1.0.0, <=1.0.2), agentbuddy (0.1.1.dev33) +102 more potentially affected by CVE-2026-28351 via pypdf (3.17.4)

pypdf PYPI version 3.17.4 is affected by a known vulnerability. The following packages have a transitive dependency on pypdf and may be impacted: - agatta =1.0.0, =0.0.3, =0.0.1, =1.1.0, =0.0.2, =1.2.0, =0.6.7, =1.2.1, =0.1.3, =0.0.1, =0.8.2 - cadenai 0.1.0 and more Source cves: CVE-2026-28351...

sereto (0.2.1), ten8t (>=0.0.14, <=0.0.21) potentially affected by CVE-2026-28351 via pypdf (5.3.1)

pypdf PYPI version 5.3.1 is affected by a known vulnerability. The following packages have a transitive dependency on pypdf and may be impacted: - sereto 0.2.1 - ten8t =0.0.14, =0.0.21 Source cves: CVE-2026-28351 Source advisory: OSV:GHSA-F2V5-7JQ9-H8CG...

gpt3discord (>=11.7.3, <=12.3.8) potentially affected by CVE-2026-28351 via pypdf (3.11.1)

pypdf PYPI version 3.11.1 is affected by a known vulnerability. The following packages have a transitive dependency on pypdf and may be impacted: - gpt3discord =11.7.3, =12.3.8 Source cves: CVE-2026-28351 Source advisory: OSV:GHSA-F2V5-7JQ9-H8CG...