{"id":"CVE-2026-111687","summary":"WeRSS (we-mp-rss) through 1.5.3 RCE via template Parameter in /rss Endpoint","details":"WeRSS (we-mp-rss) through 1.5.3 contains a remote code execution vulnerability that allows unauthenticated attackers to run code via the template parameter of the public GET /rss/{feed_id} endpoint. Attackers can supply a non-built-in ext value and a {{=expression}} template whose object-subclass traversal bypasses the eval denylist to run OS commands as the service account.","modified":"2026-10-21T02:55:12.684909746Z","published":"2026-10-16T17:39:44.866Z","database_specific":{"cwe_ids":["CWE-95"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111687.json","cna_assigner":"VulnCheck"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111687.json"},{"type":"PACKAGE","url":"https://github.com/rachelos/we-mp-rss"},{"type":"ARTICLE","url":"https://github.com/rachelos/we-mp-rss/blob/v1.5.3/apis/rss.py#L185-L198"},{"type":"ARTICLE","url":"https://github.com/rachelos/we-mp-rss/blob/v1.5.3/core/lax/template_parser.py#L1150-L1166"},{"type":"ADVISORY","url":"https://hackmd.io/@hieuPenguinnn/werss-rss-template-unauth-ssti-rce"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111687"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/werss-we-mp-rss-through-1.5.3-rce-via-template-parameter-in-rss-endpoint"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/rachelos/we-mp-rss","events":[{"introduced":"0"},{"last_affected":"bb29a7a45e516d26cf434c6f349404ff18413727"}],"database_specific":{"extracted_events":[{"strategy":"StandardRange","range":[{"introduced":"0"},{"last_affected":"1.5.3"}],"source":"AFFECTED_FIELD"}]}}],"versions":["v1.5.3","v1.5.2","v1.5.1","v1.5.0","v1.4.9"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-111687.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}]}