CVE-2026-101058

MEDIUMPre-NVD 6.96.9—
EchelonGraph scoreHIGH confidence

Score 6.9 from GitHub Security Advisory (severity: HIGH) published 2026-09-27. A secondary CVSS source baseline 6.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
6.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 6.9Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

python-utcp (pip package utcp-http) before 1.1.12 does not verify whether tool URLs declared in a hand-written UTCP manual point at the agent's own loopback interface when that manual is discovered from a remote, non-loopback origin. Because ensure_secure_url intentionally permits loopback HTTP for local development and native manuals bypassed the loopback check performed by the OpenAPI converter, an attacker who can serve a UTCP manual that a victim registers can cause the client to issue requests to services bound only to 127.0.0.1 on the victim host and have the response bodies returned to the caller (server-side request forgery). The http, sse and streamable_http protocols are all affected. Reach is limited to loopback, and exploitation further requires a loopback service that answers unauthenticated requests with useful data. Fixed in utcp-http 1.1.12, which rejects manuals fetched from a non-loopback origin that declare loopback tool URLs, keyed off the final post-redirect discovery URL.

CVSS v3
6.9
EG Score
6.9MEDIUMhigh confidence
EG Risk
31
EG Risk 31/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity69% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
6th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 27, 2026

Last Modified

September 30, 2026

Advisory Details (2)

Auto-updated Sep 27, 2026
Patch available. Sources: github.
generic

python-utcp before 1.1.12 SSRF via Remote HTTP Manual | Advisories | VulnCheck

https://www.vulncheck.com/advisories/python-utcp-before-1.1.12-ssrf-via-remote-http-manual
github Patch Available

Direct UTCP Manual Loopback SSRF via Remote HTTP Manual · Advisory · universal-tool-calling-protocol/python-utcp · GitHub

https://github.com/universal-tool-calling-protocol/python-utcp/security/advisories/GHSA-8vxx-v7r9-948g

Vendor Advisories for CVE-2026-101058(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 24× in last 7d / 24× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-04 03:48 UTCEG score recompute
  2. 2026-10-04 03:48 UTCGHSA enrichment
  3. 2026-10-03 14:25 UTCEPSS rescore
  4. 2026-10-03 02:24 UTCEG score recompute
  5. 2026-10-03 02:24 UTCGHSA enrichment
  6. 2026-10-02 00:56 UTCEG score recompute
  7. 2026-10-02 00:56 UTCGHSA enrichment
  8. 2026-10-01 19:49 UTCEPSS rescore
  9. 2026-09-30 23:31 UTCEG score recompute
  10. 2026-09-30 23:31 UTCGHSA enrichment
  11. 2026-09-30 22:26 UTCEG score recompute
  12. 2026-09-30 22:26 UTCGHSA enrichment
  13. 2026-09-30 17:47 UTCEG score recompute
  14. 2026-09-30 17:47 UTCGHSA enrichment
  15. 2026-09-30 15:02 UTCEPSS rescore
  16. 2026-09-29 23:46 UTCEG score recompute
  17. 2026-09-29 23:46 UTCGHSA enrichment
  18. 2026-09-29 15:20 UTCEPSS rescore
  19. 2026-09-28 19:49 UTCEG score recompute
  20. 2026-09-28 19:48 UTCGHSA enrichment
  21. 2026-09-28 13:50 UTCEPSS rescore
  22. 2026-09-27 18:24 UTCEG score recompute
  23. 2026-09-27 17:19 UTCEG score recompute
  24. 2026-09-27 17:18 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-101058?
CVE-2026-101058 is a medium vulnerability published on September 27, 2026. python-utcp (pip package utcp-http) before 1.1.12 does not verify whether tool URLs declared in a hand-written UTCP manual point at the agent's own loopback interface when that manual is discovered from a remote, non-loopback origin. Because ensuresecureurl intentionally permits loopback HTTP for…
When was CVE-2026-101058 disclosed?
CVE-2026-101058 was first published on September 27, 2026, with the most recent update on September 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-101058 actively exploited?
CVE-2026-101058 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (6th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-101058?
CVE-2026-101058 has a CVSS base score of 6.9 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-101058?
A fix for CVE-2026-101058 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-101058 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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