nextlevelbuilder GoClaw evolution_handlers.go auth improper authorization

published 2026-06-01 5 mo ago modified 2026-07-22 3 mo ago also EUVD-2026-33539

cvss: 5.4; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 13%
public exploits: 0; none known

A vulnerability has been found in nextlevelbuilder GoClaw up to 3.11.3. This affects the function auth of the file internal/http/evolution_handlers.go. Such manipulation leads to improper authorization. The attack can be executed remotely. The exploit has been disclosed to the public and may be used. The project tagged the reported issue as bug.

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 5 mo ago (2026-06-01)

Exploit prediction

0.23% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/nextlevelbuilder/goclaw/issues/1120 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	5.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
CNA	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:P/RL:X/RC:R
CNA	3.0	5.4	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:P/RL:X/RC:R
CNA	2.0	5.5	AV:N/AC:L/Au:S/C:N/I:P/A:P/E:POC/RL:ND/RC:UR
CNA	4.0	2.1	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/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
CNA	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
CNA	2.0	5.5	AV:N/AC:L/Au:S/C:N/I:P/A:P

Affected products

nextlevelbuilder GoClaw

Classification

Weakness

CWE-285 Improper Authorization
CWE-266 Incorrect Privilege Assignment

References

github.com /nextlevelbuilder/goclaw/issues/1120
exploit, issue-tracking
vuldb.com /vuln/367497
vdb-entry, technical-description
vuldb.com /vuln/367497/cti
signature, permissions-required
vuldb.com /cve/CVE-2026-10218
third-party-advisory
vuldb.com /submit/821938
third-party-advisory
github.com /nextlevelbuilder/goclaw/
product

Sources

CVE List CVE-2026-10218
NVD CVE-2026-10218

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary