synced 13 MIN AGO
01 Record

CVE-2026-107290

Pydantic AI: Event loop blocked by quadratic title extraction in `web_fetch`

MediumPUBLISHEDCNA: GitHub_M
CNA base score6.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
View raw JSON

02 Description

Pydantic AI: Event loop blocked by quadratic title extraction in `web_fetch`

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.51% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 43.3% of scored records. A rank, not a probability.
NVD base score
6.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD analysis status
Analyzed. NVD last modified this record on 2026-10-13.
Red Hat severity
Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-10-08 16:09Z20 DAYS AGO
Last updated
2026-10-09 15:15Z19 DAYS AGO
Reserved
2026-10-07
Assigning CNA
GitHub_M
Record state
PUBLISHED
Severity
Medium (CVSS 6.5)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weaknesses
  • CWE-1333Inefficient Regular Expression ComplexityBase
  • CWE-1322Use of Blocking Code in Single-threaded, Non-blocking ContextBase
Data version
5.2
Document digest
9297c6d5a31cb672789cf240a19d1ff504e17458beaa233b3a32ff0be2130e0c

05 Affected products

VendorProductVersionsPlatforms
pydanticpydantic-ai>= 1.77.0, < 1.107.6, >= 2.0.0b1, < 2.44.0—
pydanticpydantic-ai-slim>= 1.77.0, < 1.107.6, >= 2.0.0b1, < 2.44.0—

06 References