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8 vulnerabilities by nnn
CVE-2026-65612 (GCVE-0-2026-65612)
Vulnerability from nvd – Published: 2026-08-19 13:21 – Updated: 2026-08-20 15:57 X_Open Source
VLAI
EPSS
VEX
Title
Shell Command Injection in nnn
Summary
nnn does not sanitize the filename variable. An attacker can place a file with a crafted name on a shared filesystem, removable media, or inside an extracted archive whose name contains a single quote followed by shell syntax. If the victim navigates
to that file and opens it with preview-tabbed, the filename is embedded into the generated shell command and the injected payload executes with the privileges of the nnn process.
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
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 15:32 UTC
CWE
- CWE-78 - Improper neutralization of special elements used in an OS command ('OS command injection')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://cert.pl/en/posts/2026/08/CVE-2026-65609 | third-party-advisory |
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CVE-2026-65611 (GCVE-0-2026-65611)
Vulnerability from nvd – Published: 2026-08-19 13:21 – Updated: 2026-08-20 15:57 X_Open Source
VLAI
EPSS
VEX
Title
Shell Command Injection in nnn
Summary
nnn does not sanitize the path variable. An attacker can create a directory on a shared filesystem, removable media, or inside an extracted archive whose name contains a single quote followed by shell syntax. If the victim enters that directory in nnn and uses the batch copy or move workflow, the crafted directory name is embedded into the generated shell command and the injected payload executes with the privileges of the nnn process.
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
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 15:33 UTC
CWE
- CWE-78 - Improper neutralization of special elements used in an OS command ('OS command injection')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://cert.pl/en/posts/2026/08/CVE-2026-65609 | third-party-advisory |
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CVE-2026-65610 (GCVE-0-2026-65610)
Vulnerability from nvd – Published: 2026-08-19 13:21 – Updated: 2026-08-20 15:57 X_Open Source
VLAI
EPSS
VEX
Title
Numeric Truncation Error in nnn
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 15:32 UTC
CWE
- CWE-197 - Numeric truncation error
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://cert.pl/en/posts/2026/08/CVE-2026-65609 | third-party-advisory |
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CVE-2026-65609 (GCVE-0-2026-65609)
Vulnerability from nvd – Published: 2026-08-19 13:21 – Updated: 2026-08-20 15:57 X_Open Source
VLAI
EPSS
VEX
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
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 15:32 UTC
CWE
- CWE-787 - Out-of-bounds write
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://cert.pl/en/posts/2026/08/CVE-2026-65609 | third-party-advisory |
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CVE-2026-65612 (GCVE-0-2026-65612)
Vulnerability from cvelistv5 – Published: 2026-08-19 13:21 – Updated: 2026-08-20 15:57 X_Open Source
VLAI
EPSS
VEX
Title
Shell Command Injection in nnn
Summary
nnn does not sanitize the filename variable. An attacker can place a file with a crafted name on a shared filesystem, removable media, or inside an extracted archive whose name contains a single quote followed by shell syntax. If the victim navigates
to that file and opens it with preview-tabbed, the filename is embedded into the generated shell command and the injected payload executes with the privileges of the nnn process.
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
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 15:32 UTC
CWE
- CWE-78 - Improper neutralization of special elements used in an OS command ('OS command injection')
Assigner
References
1 reference
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CVE-2026-65611 (GCVE-0-2026-65611)
Vulnerability from cvelistv5 – Published: 2026-08-19 13:21 – Updated: 2026-08-20 15:57 X_Open Source
VLAI
EPSS
VEX
Title
Shell Command Injection in nnn
Summary
nnn does not sanitize the path variable. An attacker can create a directory on a shared filesystem, removable media, or inside an extracted archive whose name contains a single quote followed by shell syntax. If the victim enters that directory in nnn and uses the batch copy or move workflow, the crafted directory name is embedded into the generated shell command and the injected payload executes with the privileges of the nnn process.
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
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 15:33 UTC
CWE
- CWE-78 - Improper neutralization of special elements used in an OS command ('OS command injection')
Assigner
References
1 reference
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CVE-2026-65610 (GCVE-0-2026-65610)
Vulnerability from cvelistv5 – Published: 2026-08-19 13:21 – Updated: 2026-08-20 15:57 X_Open Source
VLAI
EPSS
VEX
Title
Numeric Truncation Error in nnn
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 15:32 UTC
CWE
- CWE-197 - Numeric truncation error
Assigner
References
1 reference
| URL | Tags |
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| https://cert.pl/en/posts/2026/08/CVE-2026-65609 | third-party-advisory |
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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
EPSS
VEX
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
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 15:32 UTC
CWE
- CWE-787 - Out-of-bounds write
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://cert.pl/en/posts/2026/08/CVE-2026-65609 | third-party-advisory |
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