Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The lopdf Rust crate, versions before 0.42.0, is vulnerable to a stack overflow when parsing deeply nested PDF arrays or dictionaries through its load functions such as load_mem. An attacker who can supply a crafted PDF of roughly 21 KB, for example to a service that parses untrusted files, can crash the process with an abort, which causes a denial of service. Upgrade lopdf to version 0.42.0 or later.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 7.5 | High | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | GitHub Advisory Database |
- CISA KEV Not listed.
- EPSS No score.
Timeline
- 31 Oct 2026, 14:24 UTC First seen by agentprime
- 31 Oct 2026, 14:24 UTC Confirmed by OSV