Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Versions of the october/rain Packagist package from 1.0.319 before 1.0.468 do not tie encrypted cookie values to their cookie names, so a value issued for one cookie can be replayed as another. Exploiting this requires a separate weakness in the application, such as one that returns user-supplied input as an encrypted cookie or exposes decrypted cookie contents, and the advisory rates its impact as low because it depends on those other flaws. Upgrade to version 1.0.468, which contains the fix; cookie session driver users will lose their session data on upgrade.
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 |
|---|---|---|---|---|
| 6.1 | Medium | 3.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0069, the 52nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:05 UTC First seen by agentprime
- 31 Oct 2026, 14:05 UTC Confirmed by OSV