CVE-2026-53432: Integer Overflow in fzf

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-30 · updated 2026-07-02
Weakness: CWE-190

Description

fzf is vulnerable to Integer Overflow leading to crash in FuzzyMatchV2 function. When input line length is approximately 2,200,000 bytes and pattern length is 999 bytes, the product overflows. The Go runtime detects the invalid slice bounds and terminates the process immediately with a non-recoverable panic. This issue was fixed in version 0.73.1.

Affected products

fzf: before 0.73.1 — fixed in 0.73.1

How to fix

Upgrade to a fixed version: fzf 0.73.1. Check the vendor advisory for mitigations.

References

https://cert.pl/en/posts/2026/06/CVE-2026-53432
https://github.com/junegunn/fzf
https://github.com/junegunn/fzf/commit/ccedd064ca56921a4235219516b3d834f60e7b91

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