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PYSEC-2026-4288 Pydantic AI Web chat UI (`Agent.to_web()`, `clai web`): the local chat endpoint does not validate the `Host` header

🗓️ 15 Oct 2026 10:22:51Reported by GoogleType 
osv-pysec
 osv-pysec🔗 osv.dev👁 3 Views

Pydantic AI Web chat UI lacks Host header validation, enabling DNS rebinding attacks.

Related
Refs
ReporterTitlePublishedViews
Family
cve
CVE		CVE-2026-107292
8 Oct 202616:26
–cve
cvelist
Cvelist		CVE-2026-107292 Pydantic AI Web chat UI (`Agent.to_web()`, `clai web`): the local chat endpoint does not validate the `Host` header
8 Oct 202616:26
–cvelist
euvd
EUVD		EUVD-2026-95099
8 Oct 202616:26
–euvd
github
Github Security Blog		Pydantic AI Web chat UI (`Agent.to_web()`, `clai web`): the local chat endpoint does not validate the `Host` header
8 Oct 202617:16
–github
mend
Mend		CVE-2026-107292
8 Oct 202616:26
–mend
nvd
NVD		CVE-2026-107292
8 Oct 202617:17
–nvd
osv-cleanstart
osv-cleanstart		CLEANSTART-2026-IS97035 Pydantic AI is a Python agent framework for building applications and workflows with Generative AI
15 Oct 202600:40
–osv-cleanstart
osv-ghsa
osv-ghsa		GHSA-Q2XC-RRXJ-58X9 Pydantic AI Web chat UI (`Agent.to_web()`, `clai web`): the local chat endpoint does not validate the `Host` header
8 Oct 202617:16
–osv-ghsa
osv-pysec
osv-pysec		PYSEC-2026-4279 Pydantic AI Web chat UI (`Agent.to_web()`, `clai web`): the local chat endpoint does not validate the `Host` header
15 Oct 202610:22
–osv-pysec
ptsecurity
Positive Technologies		PT-2026-108047
8 Oct 202600:00
–ptsecurity
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15 Oct 2026 14:55Current
6.2Medium risk
Vulners AI Score6.2
CVSS 3.16.4
EPSS0.00132
Pydantic AIAgent.to_web()clai webDNS rebindingHost headerdata disclosure
3