CVE-2026-114386CWE-770denial-of-service

CVE-2026-114386

Medium · published October 21, 2026

CVSS v3.1
4.8
EPSS
0%
Percentile
26.9
In the wild
Unconfirmed
What it is

Pydantic AI Harness before 0.59.0 fails to enforce UsageLimits.tool_calls_limit on nested tool calls dispatched from run_code in the CodeMode toolset. Users or prompt-injected content can make the sandboxed program invoke tools via run_nested_call() without check_before_tool_call, exceeding operator limits on costly or side-effecting tools.

The record
Technical detail
CVSS v3.1
4.8 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
CVSS v4.0
6.3 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
EPSS
0.00346 · 26.9th percentile
Weakness
CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2026-10-21T17:18Z
References (6)
https://github.com/pydantic/pydantic-ai/blob/v2.58.0/src/pydantic_ai_harness/pydantic_ai_harness/code_mode/_toolset.py#L642-L680 · [email protected]https://github.com/pydantic/pydantic-ai/commit/eb27b2b89fe76ae23ee9b6fc9eb4b227a4967949 · [email protected]https://github.com/pydantic/pydantic-ai/pull/10362 · [email protected]https://github.com/pydantic/pydantic-ai/releases/tag/v2.59.0 · [email protected]https://pypi.org/project/pydantic-ai-harness/0.59.0/ · [email protected]https://www.vulncheck.com/advisories/pydantic-ai-harness-before-0.59.0-codemode-tool-call-limit-bypass-via-run-code · [email protected]
EPSS history
Timeline
  • 23 OCT 03:55Z
    EPSS moved — → 0%
    epss
  • 21 OCT 12:39Z
    Pydantic AI Harness before 0.59.0 CodeMode Tool Call Limit Bypass via run_code
    cvelistv5
  • 21 OCT 12:39Z
    Pydantic AI Harness before 0.59.0 CodeMode Tool Call Limit Bypass via run_code
    cvelistv5