{"id":"CVE-2026-108741","revision":"6bba7a54acdd43e49383724fecd3f5d9","records":[{"revision":"6bba7a54acdd43e49383724fecd3f5d9","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-108741","aliases":[],"title":"Shepherd through 0.3.1 SSRF via DNS Rebinding in Citation Checker","description":"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. 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.","state":0,"publishedAt":"2026-10-11T12:19:45.494+00:00","modifiedAt":"2026-10-13T17:00:35.001+00:00","affected":[{"ecosystem":"https://pypi.org","name":"Shepherd","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"shepherd-agents\",\n                    \"product\": \"Shepherd\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"lessThanOrEqual\": \"0.3.1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"packageURL\": \"pkg:pypi/shepherd-ai\",\n                    \"collectionURL\": \"https://pypi.org\",\n                    \"repo\": \"https://github.com/shepherd-agents/shepherd\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","score":2.3,"severity":"LOW"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N","score":3.1,"severity":"LOW"}],"references":["https://hackmd.io/@haind03/shepherd-citation-checker-dns-rebinding-ssrf","https://github.com/shepherd-agents/shepherd/blob/d34d5ca334871dfcb5a3dc76dd78045829fa4e56/shepherd/extras/citation-checker/src/shepherd_citation_checker/_engine/network.py#L9-L17","https://github.com/shepherd-agents/shepherd/blob/d34d5ca334871dfcb5a3dc76dd78045829fa4e56/shepherd/extras/citation-checker/src/shepherd_citation_checker/_engine/fetch.py#L34-L55","https://github.com/shepherd-agents/shepherd","https://www.vulncheck.com/advisories/shepherd-through-0.3.1-ssrf-via-dns-rebinding-in-citation-checker"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-108741","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-108741","identifiers":["CVE-2026-108741"]},"retained":false,"historicalAffected":[]}],"coverage":[]}