Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The nkeys Go library versions 0.4.0 through 0.4.5 and nats-server versions 2.10.0 through 2.10.3 are affected by a flaw where xkeys encryption always used an all-zeros key instead of the intended key, so encryption was effectively to a fixed key. The source gives few details on what an attacker needs to exploit this or the full impact on authentication callouts. Upgrade nkeys to 0.4.6 and nats-server to 2.10.4, and rebuild and redeploy any Go application that uses nkeys for auth callouts.
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 |
|---|---|---|---|---|
| 7.5 | High | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0045, the 38th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:15 UTC First seen by agentprime
- 31 Oct 2026, 14:15 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-mr45-rx8q-wcm9
- OSV: GHSA-mr45-rx8q-wcm9
- github.com/nats-io/nkeys/security/advisories/GHSA-mr45-rx8q-wcm9
- nvd.nist.gov/vuln/detail/CVE-2023-46129
- github.com/nats-io/nkeys/commit/58fb9d69f42ea73fffad1d14e5914dc666f3daa1
- github.com/nats-io/nkeys
- lists.fedoraproject.org/archives/list/[email protected]/message/R3UETKPUB3V5JS5TLZOF3SMTGT5K5APS
- lists.fedoraproject.org/archives/list/[email protected]/message/ULQQONMSCQSH5Z5OWFFQHCGEZ3NL4DRJ
- www.openwall.com/lists/oss-security/2023/10/31/1