CVE-2026-53432: fzf is vulnerable to Integer Overflow leading to crash in FuzzyMatchV2 function

Q: How do I fix CVE-2026-53432?

fzf: upgrade to 0.73.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-53432 being exploited?

CVE-2026-53432 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-53432 affect?

CVE-2026-53432 affects fzf. Severity is high (CVSS 7.5). 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

Q: How urgent is CVE-2026-53432?

Priority 40/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADE

CVE-2026-53432 is a high-severity flaw (CVSS 7.5) affecting fzf. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 64%)
CISA exploited list	No
Weakness	CWE-190
Published	2026-06-30
Last modified	2026-07-02

Publisher (CNA): CERT.PL · Vendor: junegunn

Last updated 2026-07-02 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-30 13:19 UTCPublished CVE record published
2026-07-02 19:01 UTCUpdated Record last modified

junegunn fzf UPGRADE

Affected: < 0.73.1

Fixed in: 0.73.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy fzf || rpm -q fzf || fzf --version

2. UPGRADE to 0.73.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade fzf

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade fzf

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Advisories and coverage

Official advisories

CERT Polska: Vulnerabilities in fzf software 2026-06-30

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-53432?

fzf: upgrade to 0.73.1. Exact commands for each OS are on this page.

Is CVE-2026-53432 being exploited?

CVE-2026-53432 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-53432 affect?

CVE-2026-53432 affects fzf. Severity is high (CVSS 7.5). 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

How urgent is CVE-2026-53432?

Priority 40/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-53433 HIGH 7.5 UPGRADE fzf is vulnerable to a Denial of Service (DoS) due to inefficient HTTP body processing in the --listen mode du

References

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