Vulnerability details

CVE-2026-116485

huangxd- danmu_api

danmu_api before 1.21.7 Authentication Bypass via Default Token in Env Endpoints

CVSS 4.0

9.3Critical

Official description

danmu_api before 1.21.7 contains an authentication bypass vulnerability that allows unauthenticated attackers to modify server environment configuration when the default TOKEN is used and ADMIN_TOKEN is unset. Attackers can send POST requests to /api/env/set, /api/env/add, or /api/env/del to set ADMIN_TOKEN, lock out operators, redirect OTHER_SERVER or PROXY_URL for SSRF, and trigger redeployment.

CVSS scores

Score	Version	Source	Vector
9.3Critical	4.0	CVEProject cvelistV5 (CNA) (VulnCheck)	`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`
9.8Critical	3.1	CVEProject cvelistV5 (CNA) (VulnCheck)	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

Affected products

Vendor	Product	Versions	Source
huangxd-	danmu_api	v < 1.21.7	CVEProject cvelistV5 (CNA)

References and advisories

https://github.com/huangxd-/danmu_api/issues/531 issue-tracking
https://github.com/huangxd-/danmu_api/commit/6e93478064a0ce4e7ed3bc2eae88adaad1b7ab02 patch
https://github.com/huangxd-/danmu_api/blob/5ef63a01bae7c4bad4dcd7bafbbcdcf33aa82564/danmu_api/worker.js#L223-L244 technical-description
https://github.com/huangxd-/danmu_api product
https://www.vulncheck.com/advisories/danmu-api-before-1.21.7-authentication-bypass-via-default-token-in-env-endpoints third-party-advisory

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Details

Published: 2026-10-26
Last updated: 2026-11-02
State: Published
Assigner (CNA): VulnCheck
Kolun priority: 35 · Low

Exploit prediction (EPSS)

2.34%

Probability of exploitation in 30 days

83.8%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: Yes
Exploitation: None
Technical impact: Total

Weaknesses (CWE)

CWE-306
Missing Authentication for Critical Function