CVE-2018-18926 Gitea Remote Code Execution (RCE)

What is CVE-2018-18926?

CVE-2018-18926 is a critical authentication bypass vulnerability in Gitea Gitea, published on 4 Nov 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Gitea before 1.5.4 allows remote code execution because it does not properly validate session IDs. This is related to session ID handling in the go-macaron/session code for Macaron.

Weakness: CWE-384

Which versions are affected by CVE-2018-18926?

3 open source packages ship an affected version, including code.gitea.io/gitea. It affects 1 product.

Products include Gitea Gitea.

How do I fix CVE-2018-18926?

Upgrade code.gitea.io/gitea to 1.5.2 or later.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2018-18926 being exploited?

There is no known exploitation of CVE-2018-18926 in the wild and no public exploit code.

Other vulnerabilities in Gitea Gitea

• CVE-2026-60004 Gitea Code Injection Exploited Critical 9.8
• CVE-2026-73278 Gitea WebAuthn bypass during OAuth and OIDC sign-in Critical 9.8
• CVE-2026-94205 Gitea fork workflow approval bypass through maintainer-triggered events Critical 9.8
• CVE-2022-42968 Gitea vulnerable to Argument Injection Critical 9.8
• CVE-2021-45330 Improper Privilege Management in Gitea Critical 9.8

All Gitea Gitea vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-hf6f-jq25-8gq9, GO-2022-0844, UBUNTU-CVE-2018-18926.