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 by a type confusion flaw. If an integrating service builds a CedarMap from caller-controlled keys, an actor who controls those keys can make the evaluator treat a record as an entity reference, and a policy must reference that value in a when or unless clause. Upgrade to 2.3.6, 3.4.1, or 4.9.0 or later. As a workaround, reject user-supplied keys named __entity or __extn before building CedarMap objects.
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 0.0048, the 41st 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