{"id":"CVE-2026-100263","state":"PUBLISHED","title":"In JetBrains YouTrack before 2026.2.18991 stored HTML injection via the User-Agent header was possible","description":"In JetBrains YouTrack before 2026.2.18991 stored HTML injection via the User-Agent header was possible","publishedAt":"2026-09-30T15:17:49.717Z","updatedAt":"2026-09-30T15:48:39.648Z","severity":{"score":4.7,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N","source":"JetBrains"},"assigner":"JetBrains","products":["JetBrains YouTrack"],"affected":[{"vendor":"JetBrains","product":"YouTrack","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"2026.2.18991","versionType":"semver"}]}],"references":["https://www.jetbrains.com/privacy-security/issues-fixed/"],"weaknesses":["CWE-79"],"ingestedAt":"2026-10-29T20:10:13.529Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/100xxx/CVE-2026-100263.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-100263","state":"PUBLISHED","datePublished":"2026-09-30T15:17:49.717Z","dateUpdated":"2026-09-30T15:48:39.648Z","assignerShortName":"JetBrains","assignerOrgId":"547ada31-17d8-4964-bc5f-1b8238ba8014","dateReserved":"2026-09-25T17:02:05.789Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"In JetBrains YouTrack before 2026.2.18991 stored HTML injection via the User-Agent header was possible"}],"affected":[{"vendor":"JetBrains","product":"YouTrack","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"2026.2.18991","versionType":"semver"}]}],"references":[{"url":"https://www.jetbrains.com/privacy-security/issues-fixed/"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"NONE","baseScore":4.7,"baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79"}]}],"providerMetadata":{"shortName":"JetBrains","orgId":"547ada31-17d8-4964-bc5f-1b8238ba8014","dateUpdated":"2026-09-30T15:17:49.717Z"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-100263","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-09-30T15:35:06.223894Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-30T15:48:39.648Z"}}]}}}