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CVE-2026-89011

isomorphic-git < 1.42.0 Prototype Pollution via getRemoteInfo PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
isomorphic-git / isomorphic-gitaffected 0 before 1.42.0

CWE

CWE-1321

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.