Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
CedarJava (Maven package com.cedarpolicy:cedar-java) versions below 2.3.6, from 3.1.2 up to but not including 3.4.1, and from 4.0.0 up to but not including 4.9.0 are affected. The toCedarExpr() method does not escape quotes or backslashes, so an attacker who controls values that an integrator uses to build policy text at runtime can inject Cedar expressions that change authorization outcomes. Upgrade to 2.3.6, 3.4.1, 4.9.0 or later; until then, validate user input before passing it to toCedarExpr() and avoid building policies from user-controlled values.
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 |
|---|---|---|---|---|
| 8.8 | High | 3.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0052, the 44th percentile, on 9 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