{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-50013","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-02T22:46:02.579Z","datePublished":"2026-09-11T21:27:40.296Z","dateUpdated":"2026-09-14T18:17:21.942Z"},"containers":{"cna":{"title":"Hoverfly: Process Crash via Concurrent Map Write Race Condition in Diff Mode","problemTypes":[{"descriptions":[{"cweId":"CWE-362","lang":"en","description":"CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-820","lang":"en","description":"CWE-820: Missing Synchronization","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"references":[{"name":"https://github.com/SpectoLabs/hoverfly/security/advisories/GHSA-qrh4-p6v4-mrfg","tags":["x_refsource_CONFIRM"],"url":"https://github.com/SpectoLabs/hoverfly/security/advisories/GHSA-qrh4-p6v4-mrfg"},{"name":"https://github.com/SpectoLabs/hoverfly/pull/1227","tags":["x_refsource_MISC"],"url":"https://github.com/SpectoLabs/hoverfly/pull/1227"},{"name":"https://github.com/SpectoLabs/hoverfly/releases/tag/v1.12.8","tags":["x_refsource_MISC"],"url":"https://github.com/SpectoLabs/hoverfly/releases/tag/v1.12.8"}],"affected":[{"vendor":"SpectoLabs","product":"hoverfly","versions":[{"version":"< 1.12.8","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-09-11T21:27:40.296Z"},"descriptions":[{"lang":"en","value":"Hoverfly is an open source API simulation tool. Prior to version 1.12.8, when Hoverfly is running in Diff mode, the `AddDiff()` function writes to the shared `responsesDiff` map without any synchronization (no mutex). When multiple proxy requests are processed concurrently (the normal case for any proxy), the concurrent map writes trigger Go's built-in race detector which causes a `fatal error: concurrent map read and map write`, immediately killing the entire Hoverfly process. This is trivially exploitable by sending multiple simultaneous requests. Version 1.12.8 patches the issue."}],"source":{"advisory":"GHSA-qrh4-p6v4-mrfg","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-14T17:06:19.894343Z","id":"CVE-2026-50013","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"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":"2026-09-14T18:17:21.942Z"}}]}}