Access Control Bypass Affecting gitea.dev/services/repository package, versions <1.26.3
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-GOLANG-GITEADEVSERVICESREPOSITORY-17816727
- published7 Jul 2026
- disclosed3 Jul 2026
- creditUnknown
Introduced: 3 Jul 2026
CVE-2026-20896 Â (opens in a new tab)How to fix?
Upgrade gitea.dev/services/repository to version 1.26.3 or higher.
Overview
Affected versions of this package are vulnerable to Access Control Bypass due to the default configuration of REVERSE_PROXY_TRUSTED_PROXIES allowing all sources. An attacker can gain unauthorized access by sending spoofed reverse-proxy authentication headers such as X-WEBAUTH-USER.