Turborepo: Login callback CSRF/session fixation_CVE-2026-45773

5.1 / 10

MEDIUM

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

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.

Basic Information

ID CVE-2026-45773

Source GitHub_M

Published May 15, 2026 at 15:51

Modified May 15, 2026 at 16:45

Affected Product

Vendor vercel

Product turborepo

Version < 2.9.14

Affected Versions vercel turborepo < 2.9.14

CWE Classification

CWE-352 CWE-384

References

github.com /vercel/turborepo/security/advisories/GHSA-hcf7-66rw-9f5r

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