CVE-2026-17434nanocoai NanoClaw add_mcp_server request.ts handleAddMcpServer improper authorization
- 5.3MediumCVSS base score
- 0.37%Exploitation in 30 daysEPSS · top 68% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- YesPublic exploitsa reference or SSVC says so
Description
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.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. A reference of the record is tagged as an exploit. CISA's SSVC rates its exploitation: a proof of concept is public.
Show the exploits1
References tagged exploit1 reference
- https://github.com/nanocoai/nanoclaw/issues/2762 (opens in a new tab)exploitissue-tracking
Timeline
ID reserved
By VulDB
- 1 day later
· 1 day later
Published
- 1 day later
· 1 day later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| VulDBCNA (assigner) | 4.0 | Medium5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P |
| VulDBCNA (assigner) | 3.1 | Medium6.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C |
| VulDBCNA (assigner) | 3.0 | Medium6.3 | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C |
| VulDBCNA (assigner) | 2.0 | Medium6.5 | AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:OF/RC:C |
| NVDNVD · Deferred | 4.0 | Low2.1 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
- EPSS (exploitation in 30 days)
- 0.37% · top 68% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Affected products
- affected 2.0.0
- affected 2.0.1
- affected 2.0.2
- affected 2.0.3
- affected 2.0.4
- affected 2.0.5
- affected 2.0.6
- affected 2.0.7
- affected 2.0.8
- affected 2.0.9
- affected 2.0.10
- affected 2.0.11
- affected 2.0.12
- affected 2.0.13
- affected 2.0.14
- affected 2.0.15
- affected 2.0.16
- affected 2.0.17
- affected 2.0.18
- affected 2.0.19
- affected 2.0.20
- affected 2.0.21
- affected 2.0.22
- affected 2.0.23
- affected 2.0.24
- affected 2.0.25
- affected 2.0.26
- affected 2.0.27
- affected 2.0.28
- affected 2.0.29
- affected 2.0.30
- affected 2.0.31
- affected 2.0.32
- affected 2.0.33
- affected 2.0.34
- affected 2.0.35
- affected 2.0.36
- affected 2.0.37
- affected 2.0.38
- affected 2.0.39
- and 25 more
References
References8
- VDB-383075 | nanocoai NanoClaw add_mcp_server request.ts handleAddMcpServer improper authorization (opens in a new tab)vdb-entrytechnical-description
- VDB-383075 | CTI Indicators (IOB, IOC, TTP, IOA) (opens in a new tab)signaturepermissions-required
- CVE-2026-17434 | CVE Analysis and Report (opens in a new tab)third-party-advisory
- Submit #862451 | NanoCoAI NanoClaw 2.0.64 Improper Authorization (CWE-285) (opens in a new tab)third-party-advisory
- https://github.com/nanocoai/nanoclaw/issues/2762 (opens in a new tab)exploitissue-tracking
- https://github.com/nanocoai/nanoclaw/pull/2998 (opens in a new tab)issue-trackingpatch
- https://github.com/nanocoai/nanoclaw/commit/e5b928783d5c485637565eb07d2967922dfbf8d8 (opens in a new tab)patch
- https://github.com/nanocoai/nanoclaw/ (opens in a new tab)product
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-49049 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-17434)Record last updated .