CVE-2026-108741CWE-367

CVE-2026-108741

Low · published October 11, 2026

CVSS v3.1
3.1
EPSS
0%
Percentile
7.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
3.1 · LOW
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
CVSS v4.0
2.3 · 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
EPSS
0.00182 · 7.4th percentile
Weakness
CWE-367 · Time-of-check Time-of-use (TOCTOU) Race Condition
Published
2026-10-11T17:17Z
References (5)
https://github.com/shepherd-agents/shepherd · [email protected]https://github.com/shepherd-agents/shepherd/blob/d34d5ca334871dfcb5a3dc76dd78045829fa4e56/shepherd/extras/citation-checker/src/shepherd_citation_checker/_engine/fetch.py#L34-L55 · [email protected]https://github.com/shepherd-agents/shepherd/blob/d34d5ca334871dfcb5a3dc76dd78045829fa4e56/shepherd/extras/citation-checker/src/shepherd_citation_checker/_engine/network.py#L9-L17 · [email protected]https://hackmd.io/@haind03/shepherd-citation-checker-dns-rebinding-ssrf · [email protected]https://www.vulncheck.com/advisories/shepherd-through-0.3.1-ssrf-via-dns-rebinding-in-citation-checker · [email protected]
EPSS history
Timeline
  • 13 OCT 03:28Z
    EPSS moved — → 0%
    epss
  • 11 OCT 12:19Z
    Shepherd through 0.3.1 SSRF via DNS Rebinding in Citation Checker
    cvelistv5
  • 11 OCT 12:19Z
    Shepherd through 0.3.1 SSRF via DNS Rebinding in Citation Checker
    cvelistv5