CVE-2026-65609 (GCVE-0-2026-65609)

Vulnerability from cvelistv5 – Published: 2026-08-19 13:21 – Updated: 2026-08-20 15:57 X_Open Source
VLAI
Title
Out-of-bounds write in nnn
Summary
nnn is vulnerable to Out-of-Bound write vulnerability. Due to lack of validation of attacker-controlled length fields deserialized from a session file, a crafted session file can cause nnn to write data beyond the bounds of fixed-size global buffers when loaded with the -s option. An attacker who can place a malicious session file in the victim's nnn session directory can exploit this to corrupt adjacent global state. 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.
Severity
2.4 (Low)
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 15:32 UTC
CWE
Assigner
CERT-PL CNA under the ENISA root
CNA scorecard B 81/100 over 257 records in the last 180 days details
References
URL Tags
https://cert.pl/en/posts/2026/08/CVE-2026-65609 third-party-advisory
Impacted products
Vendor Product Version CPE status
nnn nnn Affected: 5.2 (git)
guessed Create a notification for this product.
Credits
Michał Majchrowicz (AFINE Team) Marcin Wyczechowski (AFINE Team)
Show details on NVD website
To clipboard 

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