{"schemaVersion":3,"id":"CVE-2026-107281","aliases":["UBUNTU-CVE-2026-107281","DEBIAN-CVE-2026-107281"],"status":"published","duplicateOf":null,"title":null,"description":"The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. Prior to 3.0.13 and 2.16.1, the HTTP/1.1 connection-pool key excludes the authenticated principal for connection-oriented NTLM and Negotiate authentication. A pooled socket authenticated for one request can be reused by a request carrying another principal, and the server executes that later request as the first identity. Basic and Digest are not affected because they authenticate each request. This issue is fixed in versions 3.0.13 and 2.16.1.","dates":{"published":"2026-10-07T21:19:09.292Z","modified":"2026-10-08T17:58:10.542Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.6,"severity":"high","version":"4.0","versionLabel":"v4.0","source":"CVE.org","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"CVE.org","score":7.6,"severity":"high","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"OSV · Ubuntu","score":7.6,"severity":"high","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","exploitability":null,"impact":null,"computed":true},{"version":"4.0","versionLabel":"v4.0","source":"OSV · Debian","score":7.6,"severity":"high","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","exploitability":null,"impact":null,"computed":true},{"version":"4.0","versionLabel":"v4.0","source":"NVD","score":7.6,"severity":"high","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00171,"percentile":0.06071,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[{"date":"2026-10-08T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00171,"percentile":0.06071}],"last30":[{"date":"2026-10-08T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00171,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00171,"percentile":0.06071}]},"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-346","name":"Origin Validation Error","description":"The product does not properly verify that the source of data or communication is valid.","type":"weakness","status":"Draft","abstraction":"Class","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/346.html"},{"id":"CWE-863","name":"Incorrect Authorization","description":"The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.","type":"weakness","status":"Incomplete","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/863.html"}],"affected":[{"vendor":"asynchttpclient","product":"async-http-client","name":"async-http-client","label":"async-http-client","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 3.0.0, < 3.0.13","noFixRecorded":false,"fixedIn":null},{"text":"≥ 2.0.0, < 2.16.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 3.0.0, < 3.0.13 | ≥ 2.0.0, < 2.16.1","eol":null,"hubHref":"/vendor/asynchttpclient/async-http-client"},{"vendor":"debian","product":"async-http-client","name":"async-http-client","label":"async-http-client","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/async-http-client","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"async-http-client","name":"async-http-client","label":"async-http-client","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/async-http-client","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-vvp4-63h8-v5pm","label":"github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-vvp4-63h8-v5pm","hostname":"github.com","tags":["X Refsource CONFIRM","REPORT"]},{"url":"https://github.com/AsyncHttpClient/async-http-client/commit/73813babf51231ee79f7da4f07b777f19f48d34d","label":"github.com/AsyncHttpClient/async-http-client/commit/73813babf51231ee79f7da4f07b777f19f48d34d","hostname":"github.com","tags":["X Refsource MISC","REPORT"]},{"url":"https://github.com/AsyncHttpClient/async-http-client/commit/83e552e64cabab2119addb6b47f7c6482997c94e","label":"github.com/AsyncHttpClient/async-http-client/commit/83e552e64cabab2119addb6b47f7c6482997c94e","hostname":"github.com","tags":["X Refsource MISC","REPORT"]},{"url":"https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-2.16.1","label":"github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-2.16.1","hostname":"github.com","tags":["X Refsource MISC","REPORT"]},{"url":"https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-3.0.13","label":"github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-3.0.13","hostname":"github.com","tags":["X Refsource MISC","REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-107281","label":"ubuntu.com/security/CVE-2026-107281","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-107281","label":"www.cve.org/CVERecord?id=CVE-2026-107281","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-107281","label":"security-tracker.debian.org/tracker/CVE-2026-107281","hostname":"security-tracker.debian.org","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-10-07T21:19:09.292Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-10-08T17:58:10.542Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":30,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T11:35:54.173Z","stale":false,"partial":false}}