{"id":"CVE-2026-55566","state":"PUBLISHED","title":"Yamcs: DOM XSS in Extension Routing","description":"Yamcs is a mission control framework. Prior to 5.12.8 and 5.13.2, Yamcs processes attacker-controlled data from the /ext URL route in yamcs-web/src/main/webapp/projects/webapp/src/app/core/routes/extension.matcher.ts, extension.component.ts, and app.component.ts without checking registered plugin IDs before DOM rendering through innerHTML. A crafted URL can execute JavaScript when opened by a user. The script can read data available to the Yamcs web application and perform actions in the user context. This issue is fixed in versions 5.12.8 and 5.13.2.","publishedAt":"2026-08-28T17:31:39.197Z","updatedAt":"2026-08-28T20:31:29.178Z","severity":{"score":4.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["yamcs yamcs"],"affected":[{"vendor":"yamcs","product":"yamcs","versions":[{"version":"< 5.12.8","status":"affected"},{"version":">= 5.13.0, < 5.13.2","status":"affected"}]}],"references":["https://github.com/yamcs/yamcs/security/advisories/GHSA-9272-wg2r-7xmx","https://github.com/yamcs/yamcs/commit/8e18e279d8ce761c21f4f67bbd06a1bff804d297","https://github.com/yamcs/yamcs/commit/ecf34a4e2ccbe085e6ceff0253595b24d5ecb4aa","https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.8","https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.2"],"weaknesses":["CWE-79"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/55xxx/CVE-2026-55566.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-55566","state":"PUBLISHED","datePublished":"2026-08-28T17:31:39.197Z","dateUpdated":"2026-08-28T20:31:29.178Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-16T23:11:20.214Z"},"containers":{"cna":{"title":"Yamcs: DOM XSS in Extension Routing","descriptions":[{"lang":"en","value":"Yamcs is a mission control framework. Prior to 5.12.8 and 5.13.2, Yamcs processes attacker-controlled data from the /ext URL route in yamcs-web/src/main/webapp/projects/webapp/src/app/core/routes/extension.matcher.ts, extension.component.ts, and app.component.ts without checking registered plugin IDs before DOM rendering through innerHTML. A crafted URL can execute JavaScript when opened by a user. The script can read data available to the Yamcs web application and perform actions in the user context. This issue is fixed in versions 5.12.8 and 5.13.2."}],"affected":[{"vendor":"yamcs","product":"yamcs","versions":[{"version":"< 5.12.8","status":"affected"},{"version":">= 5.13.0, < 5.13.2","status":"affected"}]}],"references":[{"url":"https://github.com/yamcs/yamcs/security/advisories/GHSA-9272-wg2r-7xmx","name":"https://github.com/yamcs/yamcs/security/advisories/GHSA-9272-wg2r-7xmx","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/yamcs/yamcs/commit/8e18e279d8ce761c21f4f67bbd06a1bff804d297","name":"https://github.com/yamcs/yamcs/commit/8e18e279d8ce761c21f4f67bbd06a1bff804d297","tags":["x_refsource_MISC"]},{"url":"https://github.com/yamcs/yamcs/commit/ecf34a4e2ccbe085e6ceff0253595b24d5ecb4aa","name":"https://github.com/yamcs/yamcs/commit/ecf34a4e2ccbe085e6ceff0253595b24d5ecb4aa","tags":["x_refsource_MISC"]},{"url":"https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.8","name":"https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.8","tags":["x_refsource_MISC"]},{"url":"https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.2","name":"https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.2","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-08-28T17:31:39.197Z"},"source":{"advisory":"GHSA-9272-wg2r-7xmx","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/yamcs/yamcs/security/advisories/GHSA-9272-wg2r-7xmx","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-28T20:30:29.994741Z","id":"CVE-2026-55566","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-28T20:31:29.178Z"}}]}}}