Integer overflow in Fzf
CVE-2026-53432
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.
Vulnerability class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (33.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 33.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Fzf — versions 0
- Junegunn Fzf
Weakness classification (CWE)
References
- cert.pl/en/posts/2026/06/CVE-2026-53432 (Third Party Advisory, third-party-advisory)
- github.com/junegunn/fzf (Product, product)
- github.com/junegunn/fzf/commit/ccedd064ca56921a4235219516b3d834f60e7b91 (issue-tracking, Patch)
Frequently asked questions
- What is CVE-2026-53432?
- CVE-2026-53432 is a high-severity vulnerability in Fzf, classified under Integer Overflow or Wraparound. CVSS score: 7.5/10. Published 2026-06-30.
- How severe is CVE-2026-53432?
- High severity. CVSS v3 base score is 7.5 out of 10.