CVE Explorer
CVE-2026-33223
NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Prior to versions 2.11.15 and 2.12.6, the NATS message header `Nats-Request-Info:` is supposed to be a guarantee of identity by the NATS server, but the stripping of this header from inbound messages was not fully effective. An attacker with valid credentials for any regular client interface could thus spoof their identity to services which rely upon this header. Versions 2.11.15 and 2.12.6 contain a
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"nats-server","vendor":"nats-io","versions":[{"status":"affected","version":"< 2.11.15"},{"status":"affected","version":">= 2.12.0-RC.1, < 2.12.6"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:54d51ba7a96fb80bf479d7b1bfd23281fea7a14fe6e943fce99b6fb7c79c5c87 · sha256:b9953f89a0590bfc… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:54d51ba7a96fb80bf479d7b1bfd23281fea7a14fe6e943fce99b6fb7c79c5c87 · sha256:b9953f89a0590bfc… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-290","description":"CWE-290: Authentication Bypass by Spoofing","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:54d51ba7a96fb80bf479d7b1bfd23281fea7a14fe6e943fce99b6fb7c79c5c87 · sha256:b9953f89a0590bfc… · /containers/cna/problemTypes/0/descriptions/0
Source references
2 source assertions{"name":"https://advisories.nats.io/CVE/secnote-2026-09.txt","tags":["x_refsource_MISC"],"url":"https://advisories.nats.io/CVE/secnote-2026-09.txt"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:54d51ba7a96fb80bf479d7b1bfd23281fea7a14fe6e943fce99b6fb7c79c5c87 · sha256:b9953f89a0590bfc… · /containers/cna/references/1
{"name":"https://github.com/nats-io/nats-server/security/advisories/GHSA-pwx7-fx9r-hr4h","tags":["x_refsource_CONFIRM"],"url":"https://github.com/nats-io/nats-server/security/advisories/GHSA-pwx7-fx9r-hr4h"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:54d51ba7a96fb80bf479d7b1bfd23281fea7a14fe6e943fce99b6fb7c79c5c87 · sha256:b9953f89a0590bfc… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.