CVE Explorer
CVE-2026-58254
NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.8, message trace destination checks were applied to ordinary client connections but not consistently to messages arriving through leafnode connections, allowing a leafnode operator to send trace events to subjects that would not otherwise be permitted and to use trace-only behavior to prevent normal delivery or storage of affected messages. This issue is fixed in versions 2.
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":"< 2.12.8"},{"status":"affected","version":">= 2.14.0-RC.1, < 2.14.3"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:e65c402e4ea5dcd32c31b38caf502b6fafc2c327ab057bf577383a83e30590f5 · sha256:abbbd09253204bca… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":5.3,"baseSeverity":"MEDIUM","privilegesRequired":"LOW","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW"},"metric_type":"cvssV4_0"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:e65c402e4ea5dcd32c31b38caf502b6fafc2c327ab057bf577383a83e30590f5 · sha256:abbbd09253204bca… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-863","description":"CWE-863: Incorrect Authorization","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:e65c402e4ea5dcd32c31b38caf502b6fafc2c327ab057bf577383a83e30590f5 · sha256:abbbd09253204bca… · /containers/cna/problemTypes/0/descriptions/0
Source references
4 source assertions{"name":"https://github.com/nats-io/nats-server/commit/cbe845932980b71563efac5cfa4cc751c88936cd","tags":["x_refsource_MISC"],"url":"https://github.com/nats-io/nats-server/commit/cbe845932980b71563efac5cfa4cc751c88936cd"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:e65c402e4ea5dcd32c31b38caf502b6fafc2c327ab057bf577383a83e30590f5 · sha256:abbbd09253204bca… · /containers/cna/references/1
{"name":"https://github.com/nats-io/nats-server/releases/tag/v2.12.8","tags":["x_refsource_MISC"],"url":"https://github.com/nats-io/nats-server/releases/tag/v2.12.8"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:e65c402e4ea5dcd32c31b38caf502b6fafc2c327ab057bf577383a83e30590f5 · sha256:abbbd09253204bca… · /containers/cna/references/2
{"name":"https://github.com/nats-io/nats-server/releases/tag/v2.14.3","tags":["x_refsource_MISC"],"url":"https://github.com/nats-io/nats-server/releases/tag/v2.14.3"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:e65c402e4ea5dcd32c31b38caf502b6fafc2c327ab057bf577383a83e30590f5 · sha256:abbbd09253204bca… · /containers/cna/references/3
{"name":"https://github.com/nats-io/nats-server/security/advisories/GHSA-p3j5-5hrq-p75h","tags":["x_refsource_CONFIRM"],"url":"https://github.com/nats-io/nats-server/security/advisories/GHSA-p3j5-5hrq-p75h"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:e65c402e4ea5dcd32c31b38caf502b6fafc2c327ab057bf577383a83e30590f5 · sha256:abbbd09253204bca… · /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.