CVE-2026-65609

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.

Database specific

{
    "cna_assigner": "CERT-PL",
    "cwe_ids": [
        "CWE-787"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/65xxx/CVE-2026-65609.json"
}

References

Affected packages

Git / github.com/jarun/nnn

Affected ranges

Type

GIT

Repo

https://github.com/jarun/nnn

Events

Introduced

46f076895ce28035fd190828810f123d8a22221c

Last affected

46f076895ce28035fd190828810f123d8a22221c

Database specific

Show details

{
    "extracted_events": [
        {
            "introduced": "5.2"
        },
        {
            "last_affected": "5.2"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

5.*

5.2

v5.*

v5.2

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-65609.json"