CVE Explorer
CVE-2026-27491
Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, a type coercion issue in a post actions API endpoint allowed non-staff users to issue warnings to other users. Warnings are a staff-only moderation feature. The vulnerability required the attacker to be a logged-in user and to send a specifically crafted request. No data exposure or privilege escalation beyond the ability to create unauthorized user warnings was possible. Versions 2026.3
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"discourse","vendor":"discourse","versions":[{"status":"affected","version":">= 2026.1.0-latest, < 2026.1.2"},{"status":"affected","version":">= 2026.2.0-latest, < 2026.2.1"},{"status":"affected","version":"= 2026.3.0-latest"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:7d2fbcd3bb4cecbdebe5e4c5d7f7e81eb49c5913d05dc2d239d13873a55b6148 · sha256:8a22b0fe46255229… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":6.9,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:7d2fbcd3bb4cecbdebe5e4c5d7f7e81eb49c5913d05dc2d239d13873a55b6148 · sha256:8a22b0fe46255229… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-862","description":"CWE-862: Missing Authorization","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:7d2fbcd3bb4cecbdebe5e4c5d7f7e81eb49c5913d05dc2d239d13873a55b6148 · sha256:8a22b0fe46255229… · /containers/cna/problemTypes/0/descriptions/0
Source references
4 source assertions{"name":"https://github.com/discourse/discourse/commit/60a588f4da4ab0feceb2c44787d4261b4f8757be","tags":["x_refsource_MISC"],"url":"https://github.com/discourse/discourse/commit/60a588f4da4ab0feceb2c44787d4261b4f8757be"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:7d2fbcd3bb4cecbdebe5e4c5d7f7e81eb49c5913d05dc2d239d13873a55b6148 · sha256:8a22b0fe46255229… · /containers/cna/references/1
{"name":"https://github.com/discourse/discourse/commit/d3cb203feabc46d765ecb91f348613a2bd531b89","tags":["x_refsource_MISC"],"url":"https://github.com/discourse/discourse/commit/d3cb203feabc46d765ecb91f348613a2bd531b89"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:7d2fbcd3bb4cecbdebe5e4c5d7f7e81eb49c5913d05dc2d239d13873a55b6148 · sha256:8a22b0fe46255229… · /containers/cna/references/2
{"name":"https://github.com/discourse/discourse/commit/f5fef73827da7520efc517357bd2a6bab35d7886","tags":["x_refsource_MISC"],"url":"https://github.com/discourse/discourse/commit/f5fef73827da7520efc517357bd2a6bab35d7886"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:7d2fbcd3bb4cecbdebe5e4c5d7f7e81eb49c5913d05dc2d239d13873a55b6148 · sha256:8a22b0fe46255229… · /containers/cna/references/3
{"name":"https://github.com/discourse/discourse/security/advisories/GHSA-xq37-5fvf-4m4j","tags":["x_refsource_CONFIRM"],"url":"https://github.com/discourse/discourse/security/advisories/GHSA-xq37-5fvf-4m4j"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:7d2fbcd3bb4cecbdebe5e4c5d7f7e81eb49c5913d05dc2d239d13873a55b6148 · sha256:8a22b0fe46255229… · /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.