How severe is CVE-2026-45773?

CVE-2026-45773 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2026-45773 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-45773?

CVE-2026-45773 affects Vercel Turborepo. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-45773?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-45773 have an EU (EUVD) identifier?

Yes. CVE-2026-45773 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30553.

When was CVE-2026-45773 published?

CVE-2026-45773 was published on 2026-05-15 and last updated on 2026-06-17.

CVE-2026-45773

CVE-2026-45773 is a medium-severity vulnerability in Vercel Turborepo with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-352.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v4: 5.1
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30553
Weakness: CWE-352
Affected product: Vercel Turborepo
Published: 2026-05-15
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-45773?: 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.
How severe is CVE-2026-45773?: CVE-2026-45773 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2026-45773 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-45773?: CVE-2026-45773 affects Vercel Turborepo. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-45773?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-45773 have an EU (EUVD) identifier?: Yes. CVE-2026-45773 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30553.
When was CVE-2026-45773 published?: CVE-2026-45773 was published on 2026-05-15 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:vercel:turborepo:*:*:*:*:*:node.js:*:*

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