CVE Explorer
CVE-2026-58210
NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.12, an unauthenticated MQTT client could cause the server to retain large incomplete MQTT CONNECT packets before authentication completed, consuming server memory while the parser waited for the advertised MQTT packet length. This issue is fixed in versions 2.14.3 and 2.12.12.
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":"< 2.12.12"},{"status":"affected","version":">= 2.14.0-RC.1, < 2.14.3"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:7531ab6616ae4923007bac3ad788446433baa6072ae1d4390e57262922881e14 · sha256:3ac44ec473c15a5a… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:7531ab6616ae4923007bac3ad788446433baa6072ae1d4390e57262922881e14 · sha256:3ac44ec473c15a5a… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-400","description":"CWE-400: Uncontrolled Resource Consumption","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:7531ab6616ae4923007bac3ad788446433baa6072ae1d4390e57262922881e14 · sha256:3ac44ec473c15a5a… · /containers/cna/problemTypes/0/descriptions/0
Source references
5 source assertions{"name":"https://github.com/nats-io/nats-server/commit/bce9ef39469e610aeddb819194ceb7f7edfc0861","tags":["x_refsource_MISC"],"url":"https://github.com/nats-io/nats-server/commit/bce9ef39469e610aeddb819194ceb7f7edfc0861"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:7531ab6616ae4923007bac3ad788446433baa6072ae1d4390e57262922881e14 · sha256:3ac44ec473c15a5a… · /containers/cna/references/1
{"name":"https://github.com/nats-io/nats-server/commit/e016e47bbf70304945f2ae9dc397e4862adefaf5","tags":["x_refsource_MISC"],"url":"https://github.com/nats-io/nats-server/commit/e016e47bbf70304945f2ae9dc397e4862adefaf5"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:7531ab6616ae4923007bac3ad788446433baa6072ae1d4390e57262922881e14 · sha256:3ac44ec473c15a5a… · /containers/cna/references/2
{"name":"https://github.com/nats-io/nats-server/releases/tag/v2.12.12","tags":["x_refsource_MISC"],"url":"https://github.com/nats-io/nats-server/releases/tag/v2.12.12"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:7531ab6616ae4923007bac3ad788446433baa6072ae1d4390e57262922881e14 · sha256:3ac44ec473c15a5a… · /containers/cna/references/3
{"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:v2:7531ab6616ae4923007bac3ad788446433baa6072ae1d4390e57262922881e14 · sha256:3ac44ec473c15a5a… · /containers/cna/references/4
{"name":"https://github.com/nats-io/nats-server/security/advisories/GHSA-r72h-j7qq-v6qg","tags":["x_refsource_CONFIRM"],"url":"https://github.com/nats-io/nats-server/security/advisories/GHSA-r72h-j7qq-v6qg"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:7531ab6616ae4923007bac3ad788446433baa6072ae1d4390e57262922881e14 · sha256:3ac44ec473c15a5a… · /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.