CVE-2026-107295: Pydantic AI
The National Vulnerability Database (NVD) record says that in Pydantic AI from 1.34.0 until 1.107.4 and 2.28.0, a website visited by a developer can submit a browser-compatible request to a loopback-hosted chat server, causing the served agent to run and execute tools with the privileges and credentials of the local process; fixed in 1.107.4 and 2.28.0.
The record
- Kind
- Vulnerability
- Source record
- CVE-2026-107295: Pydantic AI is a Python agent framework for building applications and workflows with Generative AI. From 1.34. (National Vulnerability Database record)
- Record published
- 2026-10-08
- Posted here
- 2026-10-12
- World
- Software agents · Enterprise work agents
- Controls concerned
- Retrieved content as data C-I1; Containment and isolation C-E5
- Checked
- Checked against its record on 2026-10-22 by a reader who did not draft it; report
verification/reports/SIG-2026-10-12-005-2026-10-22.md.
A signal's controls are the ones its record points at, the exposure; a case's controls are the ones its records show were absent or failed, so the two can differ.
Corrections
Changes to what this signal says, with the reason. Every earlier version is kept.
- 2026-10-22: Summary. Found in an independent read against the record on 22 October 2026: the summary was cut off and gave no product, versions or fix (CVE record CVE-2026-107295).
Show the change
Before: A website visited by a developer can submit a browser-compatible request to a loopback-hosted chat server, causing the served agent to run and execute tools with the privileges and credentials of the local process; client-relayed approval…After: The National Vulnerability Database (NVD) record says that in Pydantic AI from 1.34.0 until 1.107.4 and 2.28.0, a website visited by a developer can submit a browser-compatible request to a loopback-hosted chat server, causing the served agent to run and execute tools with the privileges and credentials of the local process; fixed in 1.107.4 and 2.28.0.
What a signal is. A signal records what a primary record says; it assigns no fault. It is lighter than a case: one dated item from one record, tagged with the world, sector and controls it touches. It becomes a case when it meets the bar for one.
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