CVE catalog
CVE-2025-66019
pypdf: CVE-2025-66019
- Severity
- Medium · CVSS 6.6
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.36% · Oct 25, 2026
pypdf is a free and open-source pure-python PDF library. Prior to version 6.4.0, an attacker who uses this vulnerability can craft a PDF which leads to a memory usage of up to 1 GB per stream. This requires parsing the content stream of a page using the LZWDecode filter. This issue has been patched in version 6.4.0.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | pypdf | sid | 6.21.1-1 | not affected |
| Debian | pypdf | forky | 6.21.1-1 | not affected |
| Debian | pypdf | trixie | 5.4.0-1 | not affected |
| Debian | pypdf | bookworm | 3.4.1-1+deb12u1 | not affected |
| PyPI | pypdf | Not reported | 6.4.0 | fixed |
| Opensuse | python-pypdf | tumbleweed | 6.4.0-1.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | pypdf | source | sid | Not affected | unimportant | Not reported | Not reported |
| Debian | pypdf | source | forky | Not affected | unimportant | Not reported | Not reported |
| Debian | pypdf | source | trixie | Not affected | unimportant | Not reported | Not reported |
| Debian | pypdf | source | bookworm | Not affected | unimportant | Not reported | Not reported |
| PyPI | pypdf | PyPI | Not reported | 6.4.0 | Not reported | GHSA-M449-CWJH-6PW7 | Not reported |
| Opensuse | python-pypdf | rpm | tumbleweed | 6.4.0-1.1 | Not reported | OPENSUSE-SU-2025:15776-1 | Not reported |
OpenFactory catalog packages
[openSUSE Tumbleweed]
- [python313-pypdf]Unknown
Source package: [python-pypdf]
Details (1)
6.16.2-1.1· noarch · tumbleweedUnknown · Fixed:
6.4.0-1.1Version impact unknown
dsa · python-pypdf · opensuse · tumbleweed
- [python314-pypdf]Unknown
Source package: [python-pypdf]
Details (1)
6.16.2-1.1· noarch · tumbleweedUnknown · Fixed:
6.4.0-1.1Version impact unknown
dsa · python-pypdf · opensuse · tumbleweed
[Debian 12 (Bookworm)]
- [python3-pypdf]Not affected
Source package: [pypdf]
Details (2)
3.4.1-1+deb12u1· all · bookwormNot affected
dsa · pypdf · debian · bookworm
3.4.1-1+deb12u1· all · bookwormNot affected
dsa · pypdf · debian · bookworm
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2025_15776-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2025-66019]
- [https://osv.dev/vulnerability/GHSA-m449-cwjh-6pw7]
- [https://osv.dev/vulnerability/openSUSE-SU-2025:15776-1]
- [https://security-tracker.debian.org/tracker/CVE-2025-66019]
- [https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-66019.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1730.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]