Vulnerability · Published Jun 30, 2026 · Assigned by CERT-PL

CVE-2026-53432Integer Overflow in fzf

Medium 5.6

In plain English

A medium-severity integer overflow in fzf from fzf. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)5.6Medium

Exploit odds (30 days)0.4%top 63.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	fzf	no fix listed	DEBIAN-CVE-2026-53432
Debian:13	fzf	no fix listed	DEBIAN-CVE-2026-53432
Debian:14	fzf	0.73.1-1	DEBIAN-CVE-2026-53432
Ubuntu:22.04:LTS	fzf	no fix listed	UBUNTU-CVE-2026-53432
Ubuntu:24.04:LTS	fzf	no fix listed	UBUNTU-CVE-2026-53432
Ubuntu:25.10	fzf	no fix listed	UBUNTU-CVE-2026-53432
Ubuntu:26.04:LTS	fzf	no fix listed	UBUNTU-CVE-2026-53432

Affected products (as reported)

Vendor	Product	Versions
fzf	fzf	0 – before 0.73.1

Weakness: CWE-190 · Vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

References

https://cert.pl/en/posts/2026/06/CVE-2026-53432 third-party-advisory
https://github.com/junegunn/fzf product
https://github.com/junegunn/fzf/commit/ccedd064ca56921a4235219516b3d834f60e7b91 issue-tracking