{"id":"CVE-2026-55466","aliases":["GHSA-jhph-5q74-pmfx"],"url":"https://o3.security/vulnerability/CVE-2026-55466","summary":"Snipe-IT: Stored XSS via inline-served attachment","details":"### Impact\nA low-privilege user can store an active-content payload as an asset attachment and have it served inline, same-origin, with an active Content-Type, achieving stored XSS. The application sanitizes uploads only when PHP finfo detects image/svg+xml. By submitting an XHTML document whose finfo MIME is text/xml (an allowed extension), the svg-sanitize branch is skipped, the \nhi\n\n```\n\n\n4. Noticed that it did not receive any error and the file was uploaded.\n5. Now, can just get the URL and view it. (need to add the `inline=true`).\nimage.png\n\nNotice that the XSS was able to request `document.cookie`. This means that it is possible for low privilege user to perform XSS and perform privilege escalation to admin.","published":"2026-07-10T19:37:54.362Z","modified":"2026-08-27T03:57:10.519037834Z","cvss":null,"epss":{"score":0.00439,"percentile":0.36406,"asOf":"2026-08-24"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"snipe/snipe-it","fixedVersion":"8.6.2"}],"fix":{"url":"https://github.com/grokability/snipe-it/commit/000cea0a622d586366cf60d2240c7c2a4b17c955","label":"grokability/snipe-it@000cea0"},"references":[{"type":"WEB","url":"https://github.com/grokability/snipe-it/releases/tag/v8.6.2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55466.json"},{"type":"ADVISORY","url":"https://github.com/grokability/snipe-it/security/advisories/GHSA-jhph-5q74-pmfx"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55466"},{"type":"FIX","url":"https://github.com/grokability/snipe-it/commit/000cea0a622d586366cf60d2240c7c2a4b17c955"},{"type":"PACKAGE","url":"https://github.com/grokability/snipe-it"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-27T03:57:10.519037834Z"}}