Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Cachet, the Packagist package cachethq/cachet, is affected in versions up to and including 2.4.1. An authenticated user who can create incidents can store HTML containing event-handler attributes in the incident Name and Message fields, which the source says are not sanitized, so script runs in the browser of anyone who views the public status page. The source describes possible session token theft and account takeover, including of administrators. No fixed version is listed in the advisory.
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 |
|---|---|---|---|---|
| 4.8 | Medium | 4.0 | CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0046, the 40th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 13:53 UTC First seen by agentprime
- 31 Oct 2026, 13:53 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-x397-5hrv-j9m9
- OSV: GHSA-x397-5hrv-j9m9
- github.com/cachethq/cachet/security/advisories/GHSA-x397-5hrv-j9m9
- github.com/cachethq/core/commit/23adbb88ffa819f92be4a905ff1d812670d980a2
- github.com/cachethq/core/commit/57b44a8bac0b250b0d5751e93e0349070d14606e
- github.com/cachethq/cachet