by Kastro
Paper/Archive/CVE-2026-126797

CVE-2026-126797

tongcheng-security-team NextScan — NextScan 1.1.0 through 1.2.0 Hardcoded JWT Key Authentication Bypass in ns-admin

CVSS 9.8
critical.is priorityof 100
29
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0No EPSS score.000 × 200.0No public exploit+100.0SSVC exploitation: unknown+100.0
Description · from the CVE record

NextScan 1.1.0 through 1.2.0 contains an authentication bypass vulnerability in ns-admin that allows unauthenticated attackers to forge administrator tokens using a hardcoded JWT signing key. Attackers can sign an HS256 X-Access-Token carrying the public super administrator role ID to gain full access to user management, scan tasks and stored vulnerability results.

Affected

ProductAffectedFixed inSource
NextScan1.1.0 – 1.2.0–CNA

Scores by source

VulnCheck (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

References

refgithub.com/tongcheng-security-team/NextScan/issues/48refgithub.com/tongcheng-security-team/NextScan/blob/v1.2.0/docker/docker-compose.yamlrefhub.docker.com/r/lysec/ns-adminwriteupvul.yulun.ac.cn/20261107/nextscanwriteupvulncheck.com/advisories/nextscan-1.1.0-through-1.2.0-hardcoded-jwt-key-authentication-bypass-in-ns-admin