{"id":"CVE-2026-108741","title":"Shepherd (shepherd-ai) through 0.3.1 contains a server-side request forgery guard bypass in the citation-checker extra because the public_url guard validates a resolved address but fetch re-resolves the hostname at connect time","summary":"Shepherd (shepherd-ai) through 0.3.1 contains a server-side request forgery guard bypass in the citation-checker extra because the public_url guard validates a resolved address but fetch re-resolves the hostname at connect time. Attacker…","severity":"low","cvss":3.1,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N","cwe":["CWE-367"],"published":"2026-10-11","updated":"2026-10-11","sourceUpdated":"2026-10-11T13:17:18.673","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-108741","references":[{"url":"https://github.com/shepherd-agents/shepherd","label":"disclosure@vulncheck.com"},{"url":"https://github.com/shepherd-agents/shepherd/blob/d34d5ca334871dfcb5a3dc76dd78045829fa4e56/shepherd/extras/citation-checker/src/shepherd_citation_checker/_engine/fetch.py#L34-L55","label":"disclosure@vulncheck.com"},{"url":"https://github.com/shepherd-agents/shepherd/blob/d34d5ca334871dfcb5a3dc76dd78045829fa4e56/shepherd/extras/citation-checker/src/shepherd_citation_checker/_engine/network.py#L9-L17","label":"disclosure@vulncheck.com"},{"url":"https://hackmd.io/@haind03/shepherd-citation-checker-dns-rebinding-ssrf","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/shepherd-through-0.3.1-ssrf-via-dns-rebinding-in-citation-checker","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"ingestedAt":"2026-10-11T13:51:17.035Z","slug":"CVE-2026-108741","body":"## Overview\n\nShepherd (shepherd-ai) through 0.3.1 contains a server-side request forgery guard bypass in the citation-checker extra because the public_url guard validates a resolved address but fetch re-resolves the hostname at connect time. Attackers who plant a crafted reference URL in a checked document and control its DNS can rebind it to internal addresses, sending GET requests to internal HTTP(S) services and capturing responses in evidence files.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":17,"depthScoreParts":{"impact":17.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}