Is CVE-2026-20896 in the CISA KEV catalog?

No. CVE-2026-20896 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-20896?

CVE-2026-20896 has a CVSS v3 base score of 9.8 (CRITICAL).

How do I fix or mitigate CVE-2026-20896?

No published fix for CVE-2026-20896 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2026-20896

CRITICAL

9.8

CVSS v3

NVD

Description

Gitea Docker image versions up to and including 1.26.2 use REVERSE_PROXY_TRUSTED_PROXIES=* by default, allowing any source IP to impersonate a user when reverse-proxy authentication headers such as X-WEBAUTH-USER are enabled.

CWE-284Improper Access Control

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

EPSS data unavailable for this CVE.

References

Other references4

Embed a live status badge for CVE-2026-20896

Markdown

[![CVE-2026-20896](https://tridentstack.com/cve/badge/CVE-2026-20896.svg)](https://tridentstack.com/cve/CVE-2026-20896)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-20896"><img src="https://tridentstack.com/cve/badge/CVE-2026-20896.svg" alt="CVE-2026-20896"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-03.