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CVE-2026-32243

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, an attacker with the ability to create shared AI conversations could inject arbitrary HTML and JavaScript via crafted conversation titles. This payload would execute in the browser of any user viewing the onebox preview, potentially allowing session hijacking or unauthorized actions on behalf of the victim. This issue has b
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:7b37408b18269d98d904f98392932476f8f6b0d099d4bec9ca760034d29f8778
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"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:N/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:046ec942402a8b79ba8ec6c24c3dafb95ebec923dcd92b27d9b6157158239390 · sha256:76d7dc2ef9bcdb0d… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.1,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:046ec942402a8b79ba8ec6c24c3dafb95ebec923dcd92b27d9b6157158239390 · sha256:76d7dc2ef9bcdb0d… · /containers/adp/0/metrics/0/cvssV3_1

Affected products and versions

1 source assertion
{"product":"discourse","vendor":"discourse","versions":[{"status":"affected","version":">= 2026.1.0-latest, < 2026.1.3"},{"status":"affected","version":">= 2026.2.0-latest, < 2026.2.2"},{"status":"affected","version":">= 2026.3.0-latest, < 2026.3.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:046ec942402a8b79ba8ec6c24c3dafb95ebec923dcd92b27d9b6157158239390 · sha256:76d7dc2ef9bcdb0d… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"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:N/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:046ec942402a8b79ba8ec6c24c3dafb95ebec923dcd92b27d9b6157158239390 · sha256:76d7dc2ef9bcdb0d… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.1,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:046ec942402a8b79ba8ec6c24c3dafb95ebec923dcd92b27d9b6157158239390 · sha256:76d7dc2ef9bcdb0d… · /containers/adp/0/metrics/0/cvssV3_1

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_v5cwe
    urn:baitaphish:normalized-source-record:v2:046ec942402a8b79ba8ec6c24c3dafb95ebec923dcd92b27d9b6157158239390 · sha256:76d7dc2ef9bcdb0d… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/discourse/discourse/commit/cac7d618a562ce934f8dbf73cdb70066a4806b4c","tags":["x_refsource_MISC"],"url":"https://github.com/discourse/discourse/commit/cac7d618a562ce934f8dbf73cdb70066a4806b4c"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:046ec942402a8b79ba8ec6c24c3dafb95ebec923dcd92b27d9b6157158239390 · sha256:76d7dc2ef9bcdb0d… · /containers/cna/references/1
{"name":"https://github.com/discourse/discourse/security/advisories/GHSA-pjc5-8x3w-rfwx","tags":["x_refsource_CONFIRM"],"url":"https://github.com/discourse/discourse/security/advisories/GHSA-pjc5-8x3w-rfwx"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:046ec942402a8b79ba8ec6c24c3dafb95ebec923dcd92b27d9b6157158239390 · sha256:76d7dc2ef9bcdb0d… · /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.

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