{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-55566", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-16T23:11:20.214Z", "datePublished": "2026-08-28T17:31:39.197Z", "dateUpdated": "2026-08-28T20:31:29.178Z"}, "containers": {"cna": {"title": "Yamcs: DOM XSS in Extension Routing", "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "lang": "en", "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "type": "CWE"}]}], "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"}}], "references": [{"name": "https://github.com/yamcs/yamcs/security/advisories/GHSA-9272-wg2r-7xmx", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/yamcs/yamcs/security/advisories/GHSA-9272-wg2r-7xmx"}, {"name": "https://github.com/yamcs/yamcs/commit/8e18e279d8ce761c21f4f67bbd06a1bff804d297", "tags": ["x_refsource_MISC"], "url": "https://github.com/yamcs/yamcs/commit/8e18e279d8ce761c21f4f67bbd06a1bff804d297"}, {"name": "https://github.com/yamcs/yamcs/commit/ecf34a4e2ccbe085e6ceff0253595b24d5ecb4aa", "tags": ["x_refsource_MISC"], "url": "https://github.com/yamcs/yamcs/commit/ecf34a4e2ccbe085e6ceff0253595b24d5ecb4aa"}, {"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-5.12.8"}, {"name": "https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.2", "tags": ["x_refsource_MISC"], "url": "https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.2"}], "affected": [{"vendor": "yamcs", "product": "yamcs", "versions": [{"version": "< 5.12.8", "status": "affected"}, {"version": ">= 5.13.0, < 5.13.2", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-08-28T17:31:39.197Z"}, "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."}], "source": {"advisory": "GHSA-9272-wg2r-7xmx", "discovery": "UNKNOWN"}}, "adp": [{"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"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-28T20:31:29.178Z"}}]}}

{}

{"affected": [{"affectedData": [{"product": "yamcs", "vendor": "yamcs", "versions": [{"status": "affected", "version": "< 5.12.8"}, {"status": "affected", "version": ">= 5.13.0, < 5.13.2"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "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."}], "id": "CVE-2026-55566", "lastModified": "2026-08-28T20:18:29.207", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 2.8, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-08-28T20:18:29.207", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/yamcs/yamcs/commit/8e18e279d8ce761c21f4f67bbd06a1bff804d297"}, {"source": "security-advisories@github.com", "url": "https://github.com/yamcs/yamcs/commit/ecf34a4e2ccbe085e6ceff0253595b24d5ecb4aa"}, {"source": "security-advisories@github.com", "url": "https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.8"}, {"source": "security-advisories@github.com", "url": "https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.2"}, {"source": "security-advisories@github.com", "url": "https://github.com/yamcs/yamcs/security/advisories/GHSA-9272-wg2r-7xmx"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"created": "2026-08-28T21:30:05.386424+00:00", "updated": "2026-08-28T21:30:05.386429+00:00", "vendors": []}