Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
docx4j-core (Maven org.docx4j:docx4j-core) versions before 11.5.14 are vulnerable to a stack overflow caused by cyclic style inheritance: a Word document whose styles reference each other in a loop through the basedOn chain triggers unbounded recursion during style resolution. An attacker who can get a crafted DOCX processed by the application, for example by uploading it, can crash the processing thread, which is a denial of service. Upgrade to docx4j-core 11.5.14 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 | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0063, the 50th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:19 UTC First seen by agentprime
- 31 Oct 2026, 14:19 UTC Confirmed by OSV