GHSA-php9-fj8v-98fj
pypdf: Possible long runtimes when generating appearance streams
At a glance
- Published
- Updated
- CVE
- CVE-2026-102998
- Aliases
- PYSEC-2026-4157
- CVSS_V4
- 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
Description
### 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](https://github.com/py-pdf/pypdf/releases/tag/6.19.0). ### Workarounds If you cannot upgrade yet, consider applying the changes from PR [#4087](https://github.com/py-pdf/pypdf/pull/4087).
Affected packages
| Package | Versions |
|---|---|
| PyPI · pypdf | introduced 0, fixed 6.19.0 |
References
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-php9-fj8v-98fj WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-102998 ADVISORY
- https://github.com/py-pdf/pypdf/pull/4087 WEB
- https://github.com/py-pdf/pypdf/commit/959467a9b95be83e2dc5ae873ece5f371263ede7 WEB
- https://github.com/py-pdf/pypdf PACKAGE
- https://github.com/py-pdf/pypdf/releases/tag/6.19.0 WEB
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |