CVE-2026-27779 Gitea forwarded-proto handling allows public URL spoofing
Attackers can spoof canonical URLs in Gitea by injecting malformed forwarded-proto headers, potentially misleading users or bypassing security checks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-27779?
CVE-2026-27779 is a high-severity vulnerability in Gitea Open Source Git Server, published on 3 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Gitea versions before 1.25.5 accept malformed or injected forwarded-proto values when detecting public URLs, allowing spoofed canonical URL generation.
Weakness: CWE-284
Which versions are affected by CVE-2026-27779?
3 open source packages ship an affected version, including code.gitea.io/gitea.
| Package | Affected | Fixed in |
|---|---|---|
code.gitea.io/gitea Go | All versions | 1.25.5 |
code.gitea.io/gitea Go | All versions | 1.25.5 |
code.gitea.io/gitea Go | All versions | 1.25.5 |
How do I fix CVE-2026-27779?
Upgrade code.gitea.io/gitea to 1.25.5 or later.
Is CVE-2026-27779 being exploited?
There is no known exploitation of CVE-2026-27779 in the wild and no public exploit code.
Sources
Also known as GHSA-v8f2-2ghq-9whv, GO-2026-6345.