Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Versions of github.com/open-policy-agent/opa from 0.40.0 before 0.44.0 are affected. The Rego compiler's deprecated WithUnsafeBuiltins option can be bypassed by using the "with" keyword to mock a built-in function, which the unsafe-builtins check does not cover. The source gives few details on the exact attacker position or impact. Upgrade to version 0.44.0 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 |
|---|---|---|---|---|
| 7.4 | High | 3.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.016, the 76th percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
Sources
- GitHub Advisory Database: GHSA-f524-rf33-2jjr
- OSV: GHSA-f524-rf33-2jjr
- github.com/open-policy-agent/opa/security/advisories/GHSA-f524-rf33-2jjr
- github.com/open-policy-agent/opa/pull/4540
- github.com/open-policy-agent/opa/pull/4616
- github.com/open-policy-agent/opa/commit/25a597bc3f4985162e7f65f9c36599f4f8f55823
- github.com/open-policy-agent/opa/commit/3e8c754ed007b22393cf65e48751ad9f6457fee8
- github.com/open-policy-agent/opa/releases/tag/v0.43.1