CVE-2026-53432
HighCVSS 7.5Exploitation Probability (EPSS)
Low risk15th percentile - higher than 15% of all known CVEs
Summary
An integer overflow vulnerability was discovered in the fzf tool within the FuzzyMatchV2 function. When the input line length is approximately 2,200,000 bytes and the pattern length is 999 bytes, an overflow occurs, leading to invalid slice bounds. The Go runtime detects this and immediately terminates the process with a non-recoverable panic.
Risk Assessment
An attacker can deliberately provide malicious input, causing a crash of the application using fzf, resulting in a denial of service (DoS). The vulnerability can be exploited remotely if the application processes user-supplied data.
Recommendation
Immediately update fzf to version 0.73.1 or later, which contains the fix. If an update is not possible, restrict the length of processed input lines and patterns.
Other vulnerabilities in fzf
See all- CVE-2026-115319Low
fzf versions 0.36.0 through 0.74.5 contain an inefficient algorithmic complexity vulnerability in maskActionContents that lets local attackers exhaust the --listen HTTP server via quadratic string concatenation. Repeatedly sending ~1 MB POST bodies to the unauthenticated localhost port blocks the single-threaded server for about 30 seconds each time.
- CVE-2026-53433High
A vulnerability in fzf's --listen mode causes a Denial of Service (DoS) due to inefficient HTTP body processing using repeated string concatenation, resulting in quadratic time complexity (O(n²)). A crafted POST request with many small segments can trigger excessive CPU usage, monopolizing the single-threaded HTTP server and blocking all other clients.
Original NVD description (English source)
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 data from NVD (NIST) · CISA KEV · EPSS