{"id":"EUVD-2026-76755","revision":"091669ddca084f2a96ccdf1e2ef9a64d","records":[{"revision":"091669ddca084f2a96ccdf1e2ef9a64d","observedAt":"2026-11-01T09:11:19.234+00:00","statement":{"source":"euvd","id":"EUVD-2026-76755","aliases":["CVE-2026-50013","GHSA-qrh4-p6v4-mrfg"],"title":"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 re…","description":"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.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":null}],"references":["https://github.com/SpectoLabs/hoverfly/security/advisories/GHSA-qrh4-p6v4-mrfg","https://github.com/SpectoLabs/hoverfly/pull/1227","https://github.com/SpectoLabs/hoverfly/releases/tag/v1.12.8"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-76755","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Sep 11, 2026, 9:27:40 PM","dateUpdated":"Sep 14, 2026, 6:17:21 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-76755","identifiers":["EUVD-2026-76755","CVE-2026-50013","GHSA-qrh4-p6v4-mrfg"]},"retained":false,"historicalAffected":[]}],"coverage":[]}