Numeric Truncation Error Affecting nnn package, versions *
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-ECHOLATEST-NNN-19012616
- published20 Aug 2026
- disclosed19 Aug 2026
Introduced: 19 Aug 2026
CVE-2026-65610 (opens in a new tab)How to fix?
There is no fixed version for Echo:latest nnn.
NVD Description
Note: Versions mentioned in the description apply only to the upstream nnn package and not the nnn package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
nnn stores homelen variable as uchar_t, which can only represent values in the range 0-255. An attacker who can influence the victim's execution environment can provide an arbitrary HOME path with length that is truncated to 0. The expression (homelen - 1) is promoted to signed int and becomes -1 and producing an out-of-bounds read and an out-of-bounds write one byte before the path buffer.
Maintainer of this project was notified about this vulnerability. It might has been addressed, but the maintainer did not provide a vulnerable version range. Only version 5.2 was tested and confirmed as vulnerable.