{"id":"CVE-2026-102740","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-102740","generatedAt":"2026-10-28T03:58:40.885Z","title":"The AsyncHttpClient library allows Java applications to execute HTTP requests and asynchronously process HTTP responses.","description":"The AsyncHttpClient library allows Java applications to execute HTTP requests and asynchronously process HTTP responses. From 2.0.0 until 2.16.1 and 3.0.12, PropertiesBasedResumableProcessor stores resumable download state at the predictable shared path $java.io.tmpdir/ahc/ResumableAsyncHandler.properties with default permissions and link-following file operations. A local user who can read the shared store can see download URLs, including embedded user information or query tokens. A local user who can write within or pre-create the affected shared store directory can plant a symbolic link that the client follows when saving state, truncating and overwriting a target file writable by the client process. The filesystem path is used when ResumableAsyncHandler decorates another AsyncHandler, while the no-argument constructors use a no-op processor and are unaffected. This issue is fixed in versions 2.16.1 and 3.0.12.","published":"2026-10-15T18:17:22.000Z","lastModified":"2026-10-16T20:02:38.000Z","status":"Awaiting Analysis","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":5.8,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:L"},"cwe":["CWE-61","CWE-379","CWE-732"],"affected":[],"epss":{"score":0.001,"percentile":0.00823,"date":"2026-10-27","history":[{"date":"2026-10-16","score":0.001,"percentile":0.00793}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.10%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-15T18:17:22.000Z","detail":{"score":"5.8","severity":"MEDIUM","publishedAt":"2026-10-15T18:17:21.613Z"},"summary":"New CVE, medium severity (CVSS 5.8)."}],"references":[{"url":"https://github.com/AsyncHttpClient/async-http-client/commit/0422e11c954c4b026e986d1458f7a7a2eab7e591","source":"security-advisories@github.com"},{"url":"https://github.com/AsyncHttpClient/async-http-client/commit/d945ce3357b093e74526871cd309832a717ecfda","source":"security-advisories@github.com"},{"url":"https://github.com/AsyncHttpClient/async-http-client/pull/2281","source":"security-advisories@github.com"},{"url":"https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-2.16.1","source":"security-advisories@github.com"},{"url":"https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-3.0.12","source":"security-advisories@github.com"},{"url":"https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-cf59-3jcr-vfhw","source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-102740","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}