CVE-2026-107290
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
Pydantic AI: Event loop blocked by quadratic title extraction in `web_fetch`
Pydantic AI is a Python agent framework for building applications and workflows with Generative AI. From 1.77.0 until 1.107.6 and 2.44.0, the local web_fetch_tool and the WebFetch local fallback process server-controlled responses with quadratic title extraction, whitespace normalization, and ordered-list numbering. An attacker-controlled page of modest size can therefore block the event loop for an extended period, stalling other agent runs and requests, while unsupported codecs or excessive HTML or JSON nesting can abort an individual run. This issue is fixed in versions 1.107.6 and 2.44.0.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
pydantic-ai
- Vendor
- pydantic
- Product
- pydantic-ai
- Platforms
- Unknown
- Default status
Unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| >= 1.77.0, < 1.107.6 | affected | Unavailable | Unavailable | Unavailable | None listed |
| >= 2.0.0b1, < 2.44.0 | affected | Unavailable | Unavailable | Unavailable | None listed |
pydantic-ai-slim
- Vendor
- pydantic
- Product
- pydantic-ai-slim
- Platforms
- Unknown
- Default status
Unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| >= 1.77.0, < 1.107.6 | affected | Unavailable | Unavailable | Unavailable | None listed |
| >= 2.0.0b1, < 2.44.0 | affected | Unavailable | Unavailable | Unavailable | None listed |