pypdf: Possible long runtimes for partially malformed FlateDecode streams (Follow-up)

ImpactAn attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires a partially malformed /FlateDecode stream, where the byte-by-byte decompression is used. PatchesThis has been fixed in pypdf==6.18.1. WorkaroundsIf you cannot upgrade yet, consider applying t...

pypdf: Possible long runtimes when generating appearance streams

ImpactAn attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires updating form field values with flattening enabled, which triggers appearance stream generation. PatchesThis has been fixed in pypdf==6.19.0. WorkaroundsIf you cannot upgrade yet, consider...

pypdf: Possible long runtimes/large memory usage when parsing indirect objects

ImpactAn attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires reading a PDF document with long indirect object headers, not terminated by whitespace. PatchesThis has been fixed in pypdf==6.18.0. WorkaroundsIf you cannot upgrade yet, consider applying th...

PYSEC-2026-4153 pypdf: Possible long runtimes/large memory usage when parsing indirect objects

Impact An attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires reading a PDF document with long indirect object headers, not terminated by whitespace. Patches This has been fixed in pypdf==6.18.0. Workarounds If you cannot upgrade yet, consider applying...

pypdf: Possible long runtimes with large amount of embedded files

Impact An attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing the embedded files through the dictionary-based API. Patches This has been fixed in pypdf==6.19.0. Workarounds If you cannot upgrade yet, consider applying the changes from PR 4081...

EUVD-2026-90272

pypdf: Possible long runtimes with large amount of embedded files...

pypdf: Possible long runtimes when generating appearance streams

Impact An attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires updating form field values with flattening enabled, which triggers appearance stream generation. Patches This has been fixed in pypdf==6.19.0. Workarounds If you cannot upgrade yet, consider...

GHSA-JW7Q-GVRG-4VJ3 pypdf: Possible long runtimes for partially malformed FlateDecode streams (Follow-up)

Impact An attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires a partially malformed /FlateDecode stream, where the byte-by-byte decompression is used. Patches This has been fixed in pypdf==6.18.1. Workarounds If you cannot upgrade yet, consider applyin...

pypdf: Possible long runtimes for partially malformed FlateDecode streams (Follow-up)

Impact An attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires a partially malformed /FlateDecode stream, where the byte-by-byte decompression is used. Patches This has been fixed in pypdf==6.18.1. Workarounds If you cannot upgrade yet, consider applyin...

GHSA-5JQ2-8X83-X246 pypdf: Possible long runtimes/large memory usage when parsing indirect objects

Impact An attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires reading a PDF document with long indirect object headers, not terminated by whitespace. Patches This has been fixed in pypdf==6.18.0. Workarounds If you cannot upgrade yet, consider applying...

EUVD-2026-90366

pypdf: Possible long runtimes/large memory usage when parsing indirect objects...

pypdf: Possible long runtimes/large memory usage when parsing indirect objects

Impact An attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires reading a PDF document with long indirect object headers, not terminated by whitespace. Patches This has been fixed in pypdf==6.18.0. Workarounds If you cannot upgrade yet, consider applying...

Linux Distros Unpatched Vulnerability : CVE-2026-102994

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - pypdf is a free and open-source pure-python PDF library. Prior to 6.18.0, a crafted PDF containing indirect-object identifiers or generation-number tokens that...

Linux Distros Unpatched Vulnerability : CVE-2026-102999

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - pypdf is a free and open-source pure-python PDF library. Prior to 6.19.0, a crafted PDF containing many embedded files can cause the dictionary-based attachment...

CVE-2026-102997

pypdf is a free and open-source pure-python PDF library. Prior to 6.18.1, a crafted PDF containing a partially malformed /FlateDecode stream with padded data can force pypdf/filters.py to use inefficient byte-by-byte decompression while the earlier recovery counter fails to advance for bytes that...

DEBIAN-CVE-2026-102999

pypdf is a free and open-source pure-python PDF library. Prior to 6.19.0, a crafted PDF containing many embedded files can cause the dictionary-based attachments API in pypdf/doccommon.py to reparse the full attachment list for each content lookup, producing repeated work and long runtimes when a...

CVE-2026-102999

pypdf is a free and open-source pure-python PDF library. Prior to 6.19.0, a crafted PDF containing many embedded files can cause the dictionary-based attachments API in pypdf/doccommon.py to reparse the full attachment list for each content lookup, producing repeated work and long runtimes when a...

CVE-2026-102999 pypdf: Possible long runtimes with large amount of embedded files

pypdf is a free and open-source pure-python PDF library. Prior to 6.19.0, a crafted PDF containing many embedded files can cause the dictionary-based attachments API in pypdf/doccommon.py to reparse the full attachment list for each content lookup, producing repeated work and long runtimes when a...

CVE-2026-102999 pypdf: Possible long runtimes with large amount of embedded files

pypdf is a free and open-source pure-python PDF library. Prior to 6.19.0, a crafted PDF containing many embedded files can cause the dictionary-based attachments API in pypdf/doccommon.py to reparse the full attachment list for each content lookup, producing repeated work and long runtimes when a...

CVE-2026-102999

The pypdf pure-python PDF library is vulnerable to long runtimes when processing a crafted PDF containing a large number of embedded files. Specifically, the dictionary-based attachments API in pypdf/_doc_common.py re-parses the full attachment list for every content lookup, leading to repeated w...