CVE Explorer
CVE-2026-55424
Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, a topic "featured link" was not sufficiently normalized and escaped before being rendered in the topic list, allowing a user who can set a featured link to inject JavaScript when default Content Security Policy protections were modified or disabled. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.
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, < 2026.1.5"},{"status":"affected","version":">= 2026.4.0-latest, < 2026.4.2"},{"status":"affected","version":">= 2026.5.0-latest, < 2026.5.1"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:3669a136713baee98498b0118737072a0802a47c702be442227af711ee734199 · sha256:385dc9f2da3c81c0… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":7.4,"baseSeverity":"HIGH","privilegesRequired":"LOW","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:3669a136713baee98498b0118737072a0802a47c702be442227af711ee734199 · sha256:385dc9f2da3c81c0… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-79","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:3669a136713baee98498b0118737072a0802a47c702be442227af711ee734199 · sha256:385dc9f2da3c81c0… · /containers/cna/problemTypes/0/descriptions/0
Source references
9 source assertions{"name":"https://github.com/discourse/discourse/commit/1bce8881e4253d9bbab56f011a12ef899b926b59","tags":["x_refsource_MISC"],"url":"https://github.com/discourse/discourse/commit/1bce8881e4253d9bbab56f011a12ef899b926b59"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:3669a136713baee98498b0118737072a0802a47c702be442227af711ee734199 · sha256:385dc9f2da3c81c0… · /containers/cna/references/1
{"name":"https://github.com/discourse/discourse/commit/6679d9a5083488bae10c2adbb345c481c583242c","tags":["x_refsource_MISC"],"url":"https://github.com/discourse/discourse/commit/6679d9a5083488bae10c2adbb345c481c583242c"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:3669a136713baee98498b0118737072a0802a47c702be442227af711ee734199 · sha256:385dc9f2da3c81c0… · /containers/cna/references/2
{"name":"https://github.com/discourse/discourse/commit/6828aee9b15c2655d63b515ac919830bd540ff83","tags":["x_refsource_MISC"],"url":"https://github.com/discourse/discourse/commit/6828aee9b15c2655d63b515ac919830bd540ff83"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:3669a136713baee98498b0118737072a0802a47c702be442227af711ee734199 · sha256:385dc9f2da3c81c0… · /containers/cna/references/3
{"name":"https://github.com/discourse/discourse/commit/c9b9405f5bd0bf0269e505e28e3aad388d7657c5","tags":["x_refsource_MISC"],"url":"https://github.com/discourse/discourse/commit/c9b9405f5bd0bf0269e505e28e3aad388d7657c5"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:3669a136713baee98498b0118737072a0802a47c702be442227af711ee734199 · sha256:385dc9f2da3c81c0… · /containers/cna/references/4
{"name":"https://github.com/discourse/discourse/releases/tag/v2026.1.5","tags":["x_refsource_MISC"],"url":"https://github.com/discourse/discourse/releases/tag/v2026.1.5"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:3669a136713baee98498b0118737072a0802a47c702be442227af711ee734199 · sha256:385dc9f2da3c81c0… · /containers/cna/references/5
{"name":"https://github.com/discourse/discourse/releases/tag/v2026.4.2","tags":["x_refsource_MISC"],"url":"https://github.com/discourse/discourse/releases/tag/v2026.4.2"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:3669a136713baee98498b0118737072a0802a47c702be442227af711ee734199 · sha256:385dc9f2da3c81c0… · /containers/cna/references/6
{"name":"https://github.com/discourse/discourse/releases/tag/v2026.5.1","tags":["x_refsource_MISC"],"url":"https://github.com/discourse/discourse/releases/tag/v2026.5.1"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:3669a136713baee98498b0118737072a0802a47c702be442227af711ee734199 · sha256:385dc9f2da3c81c0… · /containers/cna/references/7
{"name":"https://github.com/discourse/discourse/releases/tag/v2026.6.0","tags":["x_refsource_MISC"],"url":"https://github.com/discourse/discourse/releases/tag/v2026.6.0"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:3669a136713baee98498b0118737072a0802a47c702be442227af711ee734199 · sha256:385dc9f2da3c81c0… · /containers/cna/references/8
{"name":"https://github.com/discourse/discourse/security/advisories/GHSA-695w-7fv8-mxg3","tags":["x_refsource_CONFIRM"],"url":"https://github.com/discourse/discourse/security/advisories/GHSA-695w-7fv8-mxg3"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:3669a136713baee98498b0118737072a0802a47c702be442227af711ee734199 · sha256:385dc9f2da3c81c0… · /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.