What is CVE-2026-27812?

CVE-2026-27812 is a critical-severity vulnerability in Sub2api, classified under Improper Encoding or Escaping of Output. CVSS score: 9.1/10. Published 2026-02-26.

How severe is CVE-2026-27812?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in Sub2api

CVE-2026-27812

Sub2API is an AI API gateway platform designed to distribute and manage API quotas from AI product subscriptions. A vulnerability in versions prior to 0.1.85 is a Password Reset Poisoning (Host Header / Forwarded Header trust issue), which…

EPSS: 0.002 (15.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Sub2api
Wei-shaw Sub2api — versions < 0.1.85

Weakness classification (CWE)

CWE-116 — Improper Encoding or Escaping of Output

References

security-advisories@github.com (x_refsource_CONFIRM, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-27812?: CVE-2026-27812 is a critical-severity vulnerability in Sub2api, classified under Improper Encoding or Escaping of Output. CVSS score: 9.1/10. Published 2026-02-26.
How severe is CVE-2026-27812?: Critical severity. CVSS v3 base score is 9.1 out of 10.