Vulnerability · Published May 15, 2026 · Assigned by GitHub_M
CVE-2026-45773Turborepo: Login callback CSRF/session fixation
Medium 5.1
In plain English
A medium-severity cross-site request forgery in turborepo from vercel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Turborepo is a high-performance build system for JavaScript and TypeScript codebases. Prior to 2.9.14, Turborepo's self-hosted login and SSO browser flows did not validate a CSRF state value on the localhost callback. While the CLI was waiting for authentication, a malicious web page could send a request to the local callback server with an attacker-controlled token. If accepted before the legitimate callback, the CLI could complete login with the wrong credentials. This affects users authenticating the turbo CLI against self-hosted remote cache/auth endpoints. Vercel-hosted login flows using device authorization are not affected. This vulnerability is fixed in 2.9.14.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | turbo | 2.9.14 | GHSA-hcf7-66rw-9f5r |
Affected products (as reported)
Weakness: CWE-352, CWE-384 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:L/SI:H/SA:N
References
- https://github.com/vercel/turborepo/security/advisories/GHSA-hcf7-66rw-9f5r x_refsource_CONFIRM