Vulnerability · Published May 14, 2026 · Assigned by GitHub_M
CVE-2026-44544gittuf: Policy can be rolled back to prior valid version
Medium 4.9
In plain English
A medium-severity authorization bypass via user-controlled key in gittuf from gittuf. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
gittuf is a platform-agnostic Git security system. Prior to 0.14.0, an attacker with push access to gittuf's Reference State Log (RSL) can roll back the current policy to any previous policy trusted by the current set of root keys. gittuf determines the policy to load by inspecting the RSL. Except for the very first policy (which is automatically trusted given gittuf's TOFU model, or verified against manually specified keys), whenever an RSL entry that points to a new policy is encountered, gittuf validates that this policy is trusted. This is done by checking that the new policy’s root metadata is signed by the required threshold of the current policy's root keys. Because of this, an attacker with push access to the RSL may create a new entry that references an old policy (that is trusted by the most recent policy's set of root keys), thereby rolling back gittuf's policy to the attacker's chosen state. This vulnerability is fixed in 0.14.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | gittuf | no fix listed | DEBIAN-CVE-2026-44544 |
| Debian:14 | gittuf | 0.14.1-1 | DEBIAN-CVE-2026-44544 |
| Go | github.com/gittuf/gittuf | 0.14.0 | GO-2026-5683 |
| Go | github.com/gittuf/gittuf | 0.14.0 | GHSA-vxvc-cg7j-rwqj |
| Ubuntu:25.10 | gittuf | no fix listed | UBUNTU-CVE-2026-44544 |
| Ubuntu:26.10 | gittuf | no fix listed | UBUNTU-CVE-2026-44544 |
Affected products (as reported)
Weakness: CWE-639 · Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N