Integer Overflow in fzf

published 2026-06-30 4 mo ago modified 2026-07-02 4 mo ago also EUVD-2026-40302

cvss: 7.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 36%
public exploits: 0; none known

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.

Patch / fix

fixed in 1 distros 1 links 1

fzf fzf 0.73.1

fzf Debian 14 0.73.1-1

debian advisories DEBIAN-CVE-2026-53432

github.com/junegunn/fzf@ccedd06 commit

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-53432 updated 2026-06-30 cvss 5.0

github.com/junegunn/fzf: fzf: Denial of Service via Integer Overflow in FuzzyMatchV2 function

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 4 mo ago (2026-06-30)

Exploit prediction

0.42% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	4.0	5.6	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
CNA	4.0	5.6	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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

fzf fzf

Classification

Weakness

CWE-190 Integer Overflow or Wraparound

References

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

Sources

CVE List CVE-2026-53432
NVD CVE-2026-53432

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary