A flaw has been found in nanocoai NanoClaw up to 2.0.64. Affected is the function handleAddMcpServer of the file src/modules/self-mod/request.ts of the component add_mcp_server. Executing a manipulation can lead to improper authorization. The attack may be launched remotely. The exploit has been published and may be used. This patch is called e5b928783d5c485637565eb07d2967922dfbf8d8. A patch should be applied to remediate this issue.
CVE-2026-17434
MEDIUMPre-NVD 6.36.3—Trending — 5 sources updated this week
EchelonGraph scoreHIGH confidence
Score 6.3 from GitHub Security Advisory (severity: LOW) published 2026-07-26. a secondary CVSS source baseline 6.3; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
6.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.3Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 6.3
- EG Score
- 6.3(high)
- EG Risk
- 33(Track)EG Risk 33/100SSVC: Track
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 computedSeverity63% × 45%Exploitation0% × 40%Automatability30% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 12%
- KEV
- Not listed
Published
July 26, 2026
Last Modified
July 26, 2026
Advisory Details (3)
Auto-updated Jul 26, 2026Upstream fix merged — awaiting tagged release. Sources: github_pr.
generic
GitHub - nanocoai/nanoclaw: A lightweight alternative to OpenClaw that runs in containers for security. Connects to WhatsApp, Telegram, Slack, Discord, Gmail and other messaging apps,, has memory, scheduled jobs, and runs directly on Anthropic's Agents SDK · GitHub
https://github.com/nanocoai/nanoclaw/github_pr
fix(self-mod): render full MCP server payload on the approval card
Fix merged in nanocoai/nanoclaw PR #2998 on 2026-07-13 — awaiting tagged release
https://github.com/nanocoai/nanoclaw/pull/2998generic
[Security] NanoClaw `add_mcp_server` approval flow allows hidden `args` and `env` to be approved and persisted without being shown to the approver · Issue #2762 · nanocoai/nanoclaw · GitHub
https://github.com/nanocoai/nanoclaw/issues/2762Vendor Advisories for CVE-2026-17434(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 9× in last 7d / 9× 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.
- 2026-07-27 14:13 UTCEPSS rescore
- 2026-07-27 03:09 UTCEG score recompute
- 2026-07-27 03:09 UTCGHSA enrichment
- 2026-07-26 14:54 UTCEPSS rescore
- 2026-07-26 14:54 UTCEPSS rescore
- 2026-07-26 04:35 UTCEG score recompute
- 2026-07-26 04:33 UTCNVD updateCVSS v4 → 2.1
- 2026-07-26 03:55 UTCEG score recompute
- 2026-07-26 03:54 UTCMITRE cvelistV5first tracked
Frequently asked(5)
What is CVE-2026-17434?
CVE-2026-17434 is a medium vulnerability published on July 26, 2026. A flaw has been found in nanocoai NanoClaw up to 2.0.64. Affected is the function handleAddMcpServer of the file src/modules/self-mod/request.ts of the component addmcpserver. Executing a manipulation can lead to improper authorization. The attack may be launched remotely. The exploit has been…
When was CVE-2026-17434 disclosed?
CVE-2026-17434 was first published in the National Vulnerability Database on July 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-17434 actively exploited?
CVE-2026-17434 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 88.0% of all scored CVEs.
What is the CVSS score of CVE-2026-17434?
CVE-2026-17434 has a CVSS v3 base score of 6.3 (NVD).
How do I remediate CVE-2026-17434?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-17434, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-17434
Is Your Infrastructure Affected by CVE-2026-17434?
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