CVE catalog
CVE-2026-27888
pypdf is a free and open-source pure-python PDF library. Prior to 6.7.3, an attacker who uses this vulnerability can craft a PDF which leads to the RAM being exhausted. This requires accessing the `xf
- Severity
- Medium · CVSS 6.6
- Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.40% · Oct 25, 2026
pypdf is a free and open-source pure-python PDF library. Prior to 6.7.3, an attacker who uses this vulnerability can craft a PDF which leads to the RAM being exhausted. This requires accessing the `xfa` property of a reader or writer and the corresponding stream being compressed using `/FlateDecode`. This has been fixed in pypdf 6.7.3. As a workaround, apply the patch manually.
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 | fixed |
| Debian | pypdf | forky | 6.21.1-1 | fixed |
| Debian | pypdf | trixie | 5.4.0-1 | vulnerable |
| Debian | pypdf | bookworm | 3.4.1-1+deb12u1 | vulnerable |
| Debian | pypdf2 | bookworm | 2.12.1-3+deb12u1 | vulnerable |
| Pip | pypdf | Not reported | 6.7.3 | fixed |
| Cpe | pypdf | Not reported | Not reported | vulnerable |
| Cpe | pypdf2 | Not reported | Not reported | vulnerable |
| PyPI | pypdf | Not reported | 6.7.3 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | pypdf | source | sid | 6.9.0-1 | not yet assigned | Not reported | [1129096] |
| Debian | pypdf | source | forky | 6.9.0-1 | not yet assigned | Not reported | [1129096] |
| Debian | pypdf | source | trixie | (unfixed) | not yet assigned | Not reported | [1129096] |
| Debian | pypdf | source | bookworm | (unfixed) | not yet assigned | Not reported | [1129096] |
| Debian | pypdf2 | source | bookworm | (unfixed) | not yet assigned | Not reported | Not reported |
| Pip | pypdf | pip | Not reported | 6.7.3 | Not reported | Not reported | Not reported |
| PyPI | pypdf | PyPI | Not reported | 6.7.3 | Not reported | Not reported | Not reported |
Notes
[trixie] pypdf: Minor issue [bookworm] pypdf: Minor issue [bookworm] pypdf2: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [python3-pypdf]Affected
Source package: [pypdf]
Details (2)
3.4.1-1+deb12u1· all · bookwormAffected
nvd · pypdf · debian · bookworm; nvd · pypdf · debian · 12
3.4.1-1+deb12u1· all · bookwormAffected
nvd · pypdf · debian · bookworm; nvd · pypdf · debian · 12
- [python3-pypdf2]Affected
Source package: [pypdf2]
Details (2)
2.12.1-3+deb12u1· all · bookwormAffected
nvd · pypdf2 · debian · bookworm; nvd · pypdf2 · debian · 12
2.12.1-3+deb12u1· all · bookwormAffected
nvd · pypdf2 · debian · bookworm; nvd · pypdf2 · debian · 12
[Debian 13 (Trixie)]
- [python3-pypdf]Affected
Source package: [pypdf]
Details (2)
5.4.0-1· all · trixieAffected
nvd · pypdf · debian · 13
5.4.0-1· all · trixieAffected
nvd · pypdf · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_10284-1.json]
- [https://github.com/advisories/GHSA-x7hp-r3qg-r3cj]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-27888]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-27888]
- [https://osv.dev/vulnerability/GHSA-x7hp-r3qg-r3cj]
- [https://osv.dev/vulnerability/PYSEC-2026-3027]
- [https://security-tracker.debian.org/tracker/CVE-2026-27888]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27888.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] · [GitHub Advisory Database] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]