CVE-2026-107290
CVE-2026-107290 · Pydantic AI: Event loop blocked by quadratic title extraction in `web_fetch`
Esta página presenta datos de fuentes públicas de vulnerabilidades. Consulta el aviso original antes de actualizar.
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.
CVSS 6.5 · Media · EPSS 0,5% · Corrección disponible
- Publicación
- Actualización
Pila tecnológica: python
Productos y versiones afectados
pydantic-ai
- Versiones
- >= 1.77.0, < 1.107.6: Afectada
- >= 2.0.0b1, < 2.44.0: Afectada
Sin corrección publicada
pydantic-ai-slim
- Versiones
- >= 1.77.0, < 1.107.6: Afectada
- >= 2.0.0b1, < 2.44.0: Afectada
Sin corrección publicada
pydantic-ai PyPI
- Versiones
- 1.100.0
- 1.101.0
- 1.102.0
- 1.103.0
- 1.104.0
- 1.105.0
- 1.106.0
- 1.107.0
- 1.107.1
- 1.107.2
- 1.107.4
- 1.107.5
- 1.77.0
- 1.78.0
- 1.79.0
- 1.80.0
- 1.81.0
- 1.82.0
- 1.83.0
- 1.84.0
- 1.84.1
- 1.85.0
- 1.85.1
- 1.86.0
- 1.86.1
- 1.87.0
- 1.88.0
- 1.89.0
- 1.89.1
- 1.90.0
- 1.91.0
- 1.92.0
- 1.93.0
- 1.94.0
- 1.95.0
- 1.95.1
- 1.96.0
- 1.96.1
- 1.97.0
- 1.98.0
- 1.99.0
- Intervalos de versiones afectados
- ECOSYSTEM: ≥ 1.77.0, < 1.107.6
Actualiza a 1.107.6
pydantic-ai PyPI
- Versiones
- 2.0.0
- 2.0.0b1
- 2.0.0b2
- 2.0.0b3
- 2.0.0b4
- 2.0.0b5
- 2.0.0b6
- 2.0.0b7
- 2.1.0
- 2.10.0
- 2.11.0
- 2.12.0
- 2.13.0
- 2.14.0
- 2.14.1
- 2.15.0
- 2.16.0
- 2.17.0
- 2.18.0
- 2.19.0
- 2.2.0
- 2.20.0
- 2.21.0
- 2.22.0
- 2.23.0
- 2.24.0
- 2.25.0
- 2.26.0
- 2.27.0
- 2.27.1
- 2.28.0
- 2.29.0
- 2.3.0
- 2.30.0
- 2.31.0
- 2.31.1
- 2.32.0
- 2.32.1
- 2.32.2
- 2.33.0
- 2.34.0
- 2.35.0
- 2.35.1
- 2.35.3
- 2.36.0
- 2.37.0
- 2.38.0
- 2.39.0
- 2.4.0
- 2.40.0
- 2.41.0
- 2.42.0
- 2.43.0
- 2.5.0
- 2.5.1
- 2.6.0
- 2.7.0
- 2.8.0
- 2.9.0
- 2.9.1
- Intervalos de versiones afectados
- ECOSYSTEM: ≥ 2.0.0b1, < 2.44.0
Actualiza a 2.44.0
pydantic-ai-slim PyPI
- Versiones
- 1.100.0
- 1.101.0
- 1.102.0
- 1.103.0
- 1.104.0
- 1.105.0
- 1.106.0
- 1.107.0
- 1.107.1
- 1.107.2
- 1.107.4
- 1.107.5
- 1.77.0
- 1.78.0
- 1.79.0
- 1.80.0
- 1.81.0
- 1.82.0
- 1.83.0
- 1.84.0
- 1.84.1
- 1.85.0
- 1.85.1
- 1.86.0
- 1.86.1
- 1.87.0
- 1.88.0
- 1.89.0
- 1.89.1
- 1.90.0
- 1.91.0
- 1.92.0
- 1.93.0
- 1.94.0
- 1.95.0
- 1.95.1
- 1.96.0
- 1.96.1
- 1.97.0
- 1.98.0
- 1.99.0
- Intervalos de versiones afectados
- ECOSYSTEM: ≥ 1.77.0, < 1.107.6
Actualiza a 1.107.6
pydantic-ai-slim PyPI
- Versiones
- 2.0.0
- 2.0.0b1
- 2.0.0b2
- 2.0.0b3
- 2.0.0b4
- 2.0.0b5
- 2.0.0b6
- 2.0.0b7
- 2.1.0
- 2.10.0
- 2.11.0
- 2.12.0
- 2.13.0
- 2.14.0
- 2.14.1
- 2.15.0
- 2.16.0
- 2.17.0
- 2.18.0
- 2.19.0
- 2.2.0
- 2.20.0
- 2.21.0
- 2.22.0
- 2.23.0
- 2.24.0
- 2.25.0
- 2.26.0
- 2.27.0
- 2.27.1
- 2.28.0
- 2.29.0
- 2.3.0
- 2.30.0
- 2.31.0
- 2.31.1
- 2.32.0
- 2.32.1
- 2.32.2
- 2.33.0
- 2.34.0
- 2.35.0
- 2.35.1
- 2.35.3
- 2.36.0
- 2.37.0
- 2.38.0
- 2.39.0
- 2.4.0
- 2.40.0
- 2.41.0
- 2.42.0
- 2.43.0
- 2.5.0
- 2.5.1
- 2.6.0
- 2.7.0
- 2.8.0
- 2.9.0
- 2.9.1
- Intervalos de versiones afectados
- ECOSYSTEM: ≥ 2.0.0b1, < 2.44.0
Actualiza a 2.44.0
pydantic-ai PyPI
- Versiones
- 1.100.0
- 1.101.0
- 1.102.0
- 1.103.0
- 1.104.0
- 1.105.0
- 1.106.0
- 1.107.0
- 1.107.1
- 1.107.2
- 1.107.4
- 1.107.5
- 1.77.0
- 1.78.0
- 1.79.0
- 1.80.0
- 1.81.0
- 1.82.0
- 1.83.0
- 1.84.0
- 1.84.1
- 1.85.0
- 1.85.1
- 1.86.0
- 1.86.1
- 1.87.0
- 1.88.0
- 1.89.0
- 1.89.1
- 1.90.0
- 1.91.0
- 1.92.0
- 1.93.0
- 1.94.0
- 1.95.0
- 1.95.1
- 1.96.0
- 1.96.1
- 1.97.0
- 1.98.0
- 1.99.0
- 2.0.0
- 2.0.0b1
- 2.0.0b2
- 2.0.0b3
- 2.0.0b4
- 2.0.0b5
- 2.0.0b6
- 2.0.0b7
- 2.1.0
- 2.10.0
- 2.11.0
- 2.12.0
- 2.13.0
- 2.14.0
- 2.14.1
- 2.15.0
- 2.16.0
- 2.17.0
- 2.18.0
- 2.19.0
- 2.2.0
- 2.20.0
- 2.21.0
- 2.22.0
- 2.23.0
- 2.24.0
- 2.25.0
- 2.26.0
- 2.27.0
- 2.27.1
- 2.28.0
- 2.29.0
- 2.3.0
- 2.30.0
- 2.31.0
- 2.31.1
- 2.32.0
- 2.32.1
- 2.32.2
- 2.33.0
- 2.34.0
- 2.35.0
- 2.35.1
- 2.35.3
- 2.36.0
- 2.37.0
- 2.38.0
- 2.39.0
- 2.4.0
- 2.40.0
- 2.41.0
- 2.42.0
- 2.43.0
- 2.5.0
- 2.5.1
- 2.6.0
- 2.7.0
- 2.8.0
- 2.9.0
- 2.9.1
- Intervalos de versiones afectados
- ECOSYSTEM: ≥ 1.77.0, < 1.107.6 ∪ ≥ 2.0.0b1, < 2.44.0
Actualiza a 1.107.6; Actualiza a 2.44.0
pydantic-ai-slim PyPI
- Versiones
- 1.100.0
- 1.101.0
- 1.102.0
- 1.103.0
- 1.104.0
- 1.105.0
- 1.106.0
- 1.107.0
- 1.107.1
- 1.107.2
- 1.107.4
- 1.107.5
- 1.77.0
- 1.78.0
- 1.79.0
- 1.80.0
- 1.81.0
- 1.82.0
- 1.83.0
- 1.84.0
- 1.84.1
- 1.85.0
- 1.85.1
- 1.86.0
- 1.86.1
- 1.87.0
- 1.88.0
- 1.89.0
- 1.89.1
- 1.90.0
- 1.91.0
- 1.92.0
- 1.93.0
- 1.94.0
- 1.95.0
- 1.95.1
- 1.96.0
- 1.96.1
- 1.97.0
- 1.98.0
- 1.99.0
- 2.0.0
- 2.0.0b1
- 2.0.0b2
- 2.0.0b3
- 2.0.0b4
- 2.0.0b5
- 2.0.0b6
- 2.0.0b7
- 2.1.0
- 2.10.0
- 2.11.0
- 2.12.0
- 2.13.0
- 2.14.0
- 2.14.1
- 2.15.0
- 2.16.0
- 2.17.0
- 2.18.0
- 2.19.0
- 2.2.0
- 2.20.0
- 2.21.0
- 2.22.0
- 2.23.0
- 2.24.0
- 2.25.0
- 2.26.0
- 2.27.0
- 2.27.1
- 2.28.0
- 2.29.0
- 2.3.0
- 2.30.0
- 2.31.0
- 2.31.1
- 2.32.0
- 2.32.1
- 2.32.2
- 2.33.0
- 2.34.0
- 2.35.0
- 2.35.1
- 2.35.3
- 2.36.0
- 2.37.0
- 2.38.0
- 2.39.0
- 2.4.0
- 2.40.0
- 2.41.0
- 2.42.0
- 2.43.0
- 2.5.0
- 2.5.1
- 2.6.0
- 2.7.0
- 2.8.0
- 2.9.0
- 2.9.1
- Intervalos de versiones afectados
- ECOSYSTEM: ≥ 1.77.0, < 1.107.6 ∪ ≥ 2.0.0b1, < 2.44.0
Actualiza a 1.107.6; Actualiza a 2.44.0
Fuentes originales
- https://github.com/pydantic/pydantic-ai/security/advisories/GHSA-fpf4-vwcp-v4hp
- https://github.com/pydantic/pydantic-ai/pull/8397
- https://github.com/pydantic/pydantic-ai/pull/8399
- https://github.com/pydantic/pydantic-ai/pull/8418
- https://github.com/pydantic/pydantic-ai/pull/84332
- https://github.com/pydantic/pydantic-ai/pull/8434
- https://github.com/pydantic/pydantic-ai/commit/2faa6181d8a17d83bc9516d035c5270db8730fa0
- https://github.com/pydantic/pydantic-ai/commit/9cdc952e4c3319e85a3e04f2de49fbbb765bd38b
- https://github.com/pydantic/pydantic-ai/commit/a93ea5226be1e93ae13131ae3f22287190411389
- https://github.com/pydantic/pydantic-ai/commit/c3fd1cc1f15fdbf750d78e4e3ec1e8b4d6a3d920
- https://github.com/pydantic/pydantic-ai/commit/fb92ccfc3ca2735dab877e2ed73856681bf72ad1
- https://github.com/pydantic/pydantic-ai/releases/tag/v1.107.6
- https://github.com/pydantic/pydantic-ai/releases/tag/v2.44.0
- https://nvd.nist.gov/vuln/detail/CVE-2026-107290