Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The utcp-http PyPI package before 1.1.2 is vulnerable to server-side request forgery: its tool invocation path does not recheck the URL taken from an OpenAPI spec's servers field, so a malicious spec served from an HTTPS endpoint can point tool calls at internal addresses, such as cloud metadata services. An attacker who can get the agent to register such a spec can read responses from those internal endpoints. Upgrade to utcp-http 1.1.2, which validates the URL before each request.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 4.7 | Medium | 3.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0018, the 7th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:01 UTC First seen by agentprime
- 31 Oct 2026, 15:01 UTC Confirmed by OSV