{"id":"CVE-2026-108741","state":"PUBLISHED","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.","publishedAt":"2026-10-11T12:19:45.494Z","updatedAt":"2026-10-13T17:00:35.001Z","severity":{"score":2.3,"label":"Low","version":"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","source":"VulnCheck"},"assigner":"VulnCheck","products":["shepherd-agents Shepherd"],"affected":[{"vendor":"shepherd-agents","product":"Shepherd","packageURL":"pkg:pypi/shepherd-ai","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"0.3.1","versionType":"semver"}],"collectionURL":"https://pypi.org","repo":"https://github.com/shepherd-agents/shepherd"}],"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"],"weaknesses":["CWE-367"],"ingestedAt":"2026-10-29T20:10:33.477Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/108xxx/CVE-2026-108741.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-108741","state":"PUBLISHED","datePublished":"2026-10-11T12:19:45.494Z","dateUpdated":"2026-10-13T17:00:35.001Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-10-11T01:52:55.363Z"},"containers":{"cna":{"title":"Shepherd through 0.3.1 SSRF via DNS Rebinding in Citation Checker","descriptions":[{"lang":"en","value":"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. 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