CVE Explorer
CVE-2026-3590
Mattermost versions 10.11.x <= 10.11.12, 11.5.x <= 11.5.0, 11.4.x <= 11.4.2, 11.3.x <= 11.3.2 fail to enforce atomic single-use consumption of guest magic link tokens, which allows an attacker with access to a valid magic link to establish multiple independent authenticated sessions via concurrent requests.. Mattermost Advisory ID: MMSA-2026-00624
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unaffected","product":"Mattermost","vendor":"Mattermost","versions":[{"lessThanOrEqual":"10.11.12","status":"affected","version":"10.11.0","versionType":"semver"},{"lessThanOrEqual":"11.5.0","status":"affected","version":"11.5.0","versionType":"semver"},{"lessThanOrEqual":"11.4.2","status":"affected","version":"11.4.0","versionType":"semver"},{"lessThanOrEqual":"11.3.2","status":"affected","version":"11.3.0","versionType":"semver"},{"status":"unaffected","version":"11.6.0"},{"status":"unaffected","version":"10.11.13"},{"status":"unaffected","version":"11.5.1"},{"status":"unaf…
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:22fc5f988aeab4ba288a9fab97afa67d42c22bc1ad332909968209190b40627f · sha256:46fedd2f54f3055e… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:22fc5f988aeab4ba288a9fab97afa67d42c22bc1ad332909968209190b40627f · sha256:46fedd2f54f3055e… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-367","description":"CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:22fc5f988aeab4ba288a9fab97afa67d42c22bc1ad332909968209190b40627f · sha256:46fedd2f54f3055e… · /containers/cna/problemTypes/0/descriptions/0
Source references
1 source assertion{"name":"MMSA-2026-00624","tags":["vendor-advisory"],"url":"https://mattermost.com/security-updates"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:22fc5f988aeab4ba288a9fab97afa67d42c22bc1ad332909968209190b40627f · sha256:46fedd2f54f3055e… · /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.