CVE-2025-55197 — Uncontrolled Resource Consumption

Vendor	Product	Version range	Fixed in
debian	pypdf	< pypdf 6.9.0-1 (forky)	pypdf 6.9.0-1 (forky)
debian	pypdf2	< pypdf 6.9.0-1 (forky)	pypdf 6.9.0-1 (forky)
py-pdf	pypdf	< 6.0.0	6.0.0
pypdf_project	pypdf	< 6.0.0	6.0.0
pypdf_project	pypdf	>= 0 < 6.9.0-1	6.9.0-1
pypdf_project	pypdf	>= 0 < 6.0.0	6.0.0

Red Hat

pypdf: PyPDF RAM Exhaustion Vulnerability

vendor_redhat·2025-08-13·CVSS 6.6

CVE-2025-55197 [MEDIUM] CWE-770 pypdf: PyPDF RAM Exhaustion Vulnerability pypdf: PyPDF RAM Exhaustion Vulnerability pypdf is a free and open-source pure-python PDF library. Prior to version 6.0.0, an attacker can craft a PDF which leads to the RAM being exhausted. This requires just reading the file if a series of FlateDecode filters is used on a malicious cross-reference stream. Other content streams are affected on explicit access. This issue has been fixed in 6.0.0. If an update is not possible, a workaround involves including the fixed code from pypdf.filters.decompress into the existing filters file. A flaw was found in pypdf. Processing maliciously crafted PDF files utilizing a sequence of FlateDecode filters can exhaust available RAM. An attacker can trigger this condition by simply reading the malicious PDF file. This results in a resource exhaustion c

Debian

CVE-2025-55197: pypdf - pypdf is a free and open-source pure-python PDF library. Prior to version 6.0.0,...

vendor_debian·2025·CVSS 6.6

CVE-2025-55197 [MEDIUM] CVE-2025-55197: pypdf - pypdf is a free and open-source pure-python PDF library. Prior to version 6.0.0,... pypdf is a free and open-source pure-python PDF library. Prior to version 6.0.0, an attacker can craft a PDF which leads to the RAM being exhausted. This requires just reading the file if a series of FlateDecode filters is used on a malicious cross-reference stream. Other content streams are affected on explicit access. This issue has been fixed in 6.0.0. If an update is not possible, a workaround involves including the fixed code from pypdf.filters.decompress into the existing filters file. Scope: local bookworm: open forky: resolved (fixed in 6.9.0-1) sid: resolved (fixed in 6.9.0-1) trixie: open

GHSA

PyPDF's Manipulated FlateDecode streams can exhaust RAM

ghsa·2025-08-13

CVE-2025-55197 [MEDIUM] CWE-400 PyPDF's Manipulated FlateDecode streams can exhaust RAM PyPDF's Manipulated FlateDecode streams can exhaust RAM ### Impact An attacker who uses this vulnerability can craft a PDF which leads to the RAM being exhausted. This requires just reading the file if a series of FlateDecode filters is used on a malicious cross-reference stream. Other content streams are affected on explicit access. ### Patches This has been fixed in [pypdf==6.0.0](https://github.com/py-pdf/pypdf/releases/tag/6.0.0). ### Workarounds If you cannot upgrade yet, you might want to implement the workaround for `pypdf.filters.decompress` yourself: https://github.com/py-pdf/pypdf/blob/0dd57738bbdcdb63f0fb43d8a6b3d222b6946595/pypdf/filters.py#L72-L143 ### References This issue has been reported in #3429 and fixed in #3430.

OSV

PyPDF's Manipulated FlateDecode streams can exhaust RAM

osv·2025-08-13

CVE-2025-55197 [MEDIUM] PyPDF's Manipulated FlateDecode streams can exhaust RAM PyPDF's Manipulated FlateDecode streams can exhaust RAM ### Impact An attacker who uses this vulnerability can craft a PDF which leads to the RAM being exhausted. This requires just reading the file if a series of FlateDecode filters is used on a malicious cross-reference stream. Other content streams are affected on explicit access. ### Patches This has been fixed in [pypdf==6.0.0](https://github.com/py-pdf/pypdf/releases/tag/6.0.0). ### Workarounds If you cannot upgrade yet, you might want to implement the workaround for `pypdf.filters.decompress` yourself: https://github.com/py-pdf/pypdf/blob/0dd57738bbdcdb63f0fb43d8a6b3d222b6946595/pypdf/filters.py#L72-L143 ### References This issue has been reported in #3429 and fixed in #3430.

OSV

CVE-2025-55197: pypdf is a free and open-source pure-python PDF library

osv·2025-08-13·CVSS 6.6

CVE-2025-55197 [MEDIUM] CVE-2025-55197: pypdf is a free and open-source pure-python PDF library pypdf is a free and open-source pure-python PDF library. Prior to version 6.0.0, an attacker can craft a PDF which leads to the RAM being exhausted. This requires just reading the file if a series of FlateDecode filters is used on a malicious cross-reference stream. Other content streams are affected on explicit access. This issue has been fixed in 6.0.0. If an update is not possible, a workaround involves including the fixed code from pypdf.filters.decompress into the existing filters file.

CVE-2025-55197: pypdf is a free and open-source pure-python PDF library. Prior to version 6.0.0, an attacker can craft a PDF which leads to the RAM being exhausted. This…

Affected

CVSS provenance