CVE-2026-108741 Shepherd through 0.3.1 SSRF via DNS Rebinding in Citation Checker
Attackers can bypass SSRF guards via DNS rebinding to access internal services and capture responses in evidence files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-108741?
CVE-2026-108741 is a low-severity server-side request forgery vulnerability in shepherd-agents Shepherd, published on 11 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-367
Which versions are affected by CVE-2026-108741?
How do I fix CVE-2026-108741?
No fix has been published for CVE-2026-108741 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-108741 being exploited?
There is no known exploitation of CVE-2026-108741 in the wild and no public exploit code.
Sources
Also known as GHSA-53wh-3r96-488v.