{"schemaVersion":3,"id":"CVE-2025-55181","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Sending an HTTP request/response body with greater than 2^31 bytes triggers an infinite loop in proxygen::coro::HTTPQuicCoroSession which blocks the backing event loop and unconditionally appends data to a std::vector per-loop iteration. This issue leads to unbounded memory growth and eventually causes the process to run out of memory.","dates":{"published":"2025-12-02T22:13:31.101Z","modified":"2025-12-03T00:33:57.022Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5.3,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":5.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":5.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00293,"percentile":0.20625,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.00293},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00293,"percentile":0.20625}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00293,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00293,"percentile":0.20625}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-834","name":"Excessive Iteration","description":"The product performs an iteration or loop without sufficiently limiting the number of times that the loop is executed.","type":"weakness","status":"Incomplete","abstraction":"Class","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/834.html"}],"affected":[{"vendor":"facebook","product":"proxygen","name":"proxygen","label":"proxygen","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ v2025.08.25.00, ≤ v2025.12.01.00","noFixRecorded":false,"fixedIn":null},{"text":"≥ 2025.08.25.00, ≤ 2025.12.01.00","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ v2025.08.25.00, ≤ v2025.12.01.00 | ≥ 2025.08.25.00, ≤ 2025.12.01.00","eol":null,"hubHref":"/vendor/facebook/proxygen"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://www.facebook.com/security/advisories/cve-2025-55181","label":"www.facebook.com/security/advisories/cve-2025-55181","hostname":"www.facebook.com","tags":["X Refsource CONFIRM","Vendor Advisory"]},{"url":"https://github.com/facebook/proxygen/commit/17689399ef99b7c3d3a8b2b768b1dba1a4b72f8f","label":"github.com/facebook/proxygen/commit/17689399ef99b7c3d3a8b2b768b1dba1a4b72f8f","hostname":"github.com","tags":["X Refsource CONFIRM","Patch"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2025-12-02T22:13:31.101Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2025-12-03T00:33:57.022Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":21,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T11:36:08.202Z","stale":false,"partial":false}}