{"cve":"CVE-2021-43795","nvd":{"published":"2021-12-02T18:15:08.267","modified":"2026-06-17T04:11:27.303","status":"Modified","description":"Armeria is an open source microservice framework. In affected versions an attacker can access an Armeria server's local file system beyond its restricted directory by sending an HTTP request whose path contains `%2F` (encoded `/`), such as `/files/..%2Fsecrets.txt`, bypassing Armeria's path validation logic. Armeria 1.13.4 or above contains the hardened path validation logic that handles `%2F` properly. This vulnerability can be worked around by inserting a decorator that performs an additional validation on the request path.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5},"cwes":["CWE-22"],"references":["https://github.com/line/armeria/commit/e2697a575e9df6692b423e02d731f293c1313284","https://github.com/line/armeria/pull/3855","https://github.com/line/armeria/security/advisories/GHSA-8fp4-rp6c-5gcv","https://github.com/line/armeria/commit/e2697a575e9df6692b423e02d731f293c1313284","https://github.com/line/armeria/pull/3855"],"products":["linecorp:armeria"],"source":"nvd","synced_at":"2026-10-19T21:25:41.256909649+00:00"},"epss":{"cve":"CVE-2021-43795","score":0.01692,"percentile":0.77105,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-8fp4-rp6c-5gcv","url":"https://osv.dev/vulnerability/GHSA-8fp4-rp6c-5gcv","summary":"Path Traversal in com.linecorp.armeria:armeria","modified":"2026-07-08T06:28:32.358987072Z","packages":[{"ecosystem":"Maven","name":"com.linecorp.armeria:armeria","purl":"pkg:maven/com.linecorp.armeria/armeria","ranges":[">=1.12.0 <1.13.4"],"fixed":["1.13.4"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}