{"id":"CVE-2026-55497","aliases":["GHSA-g9j2-8w95-3vwv","GO-2026-6100"],"url":"https://o3.security/vulnerability/CVE-2026-55497","summary":"Cloudreve: Server crash through image decompression/pixel bomb in thumbnail & avatar decoding (DoS)","details":"Cloudreve is a self-hosted file management and sharing system. Prior to 4.17.0, the built-in thumbnail and avatar image decoders limit compressed file size but do not limit decoded pixel dimensions, allowing an authenticated user to submit a small PNG, JPEG, or GIF that triggers an unbounded allocation and terminates the Cloudreve process through fatal out-of-memory behavior. This issue is fixed in version 4.17.0.","published":"2026-07-31T03:28:59.171Z","modified":"2026-08-18T15:10:48.443315170Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},"epss":{"score":0.00295,"percentile":0.21813,"asOf":"2026-09-06"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/cloudreve/Cloudreve/v4","fixedVersion":"4.0.0-20260613024411-3607f79bb44c"},{"ecosystem":"Go","name":"github.com/cloudreve/Cloudreve/v3","fixedVersion":null}],"fix":{"url":"https://github.com/cloudreve/cloudreve/commit/3607f79bb44c35d0be4fa8b6e24c0502b51415a9","label":"cloudreve/cloudreve@3607f79"},"references":[{"type":"WEB","url":"https://github.com/cloudreve/cloudreve/releases/tag/4.17.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55497.json"},{"type":"ADVISORY","url":"https://github.com/cloudreve/cloudreve/security/advisories/GHSA-g9j2-8w95-3vwv"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55497"},{"type":"FIX","url":"https://github.com/cloudreve/cloudreve/commit/3607f79bb44c35d0be4fa8b6e24c0502b51415a9"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-18T15:10:48.443315170Z"}}