CVE Catalog

CVE-2026-89011

HighCVSS 7.1
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.26%

19th percentile - higher than 19% of all known CVEs

Summary

isomorphic-git before 1.42.0 contains a prototype pollution vulnerability in the getRemoteInfo function. A malicious Git server operator can pollute Object.prototype by advertising crafted ref names containing '__proto__' path segments during ref negotiation.

Risk Assessment

An attacker controlling a Git server can reroute subsequent network operations through an attacker-controlled proxy and cause the victim's credentials to be transmitted to the attacker via the onAuth callback.

Recommendation

Upgrade the isomorphic-git library to version 1.42.0 or newer.

Related vulnerabilities

Original NVD description (English source)

isomorphic-git before 1.42.0 contains a prototype pollution vulnerability in the getRemoteInfo function that allows a malicious Git server operator to pollute Object.prototype by advertising crafted ref names containing '__proto__' path segments during ref negotiation. Attackers controlling a Git server can advertise a specially crafted ref such as '__proto__/corsProxy' to reroute all subsequent network operations through an attacker-controlled proxy, causing isomorphic-git to invoke the victim's onAuth callback and transmit credentials to the attacker when the victim calls getRemoteInfo with an attacker-supplied URL.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS