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CVE-2026-116844 (GCVE-0-2026-116844)

Vulnerability from nvd – Published: 2026-10-27 00:34 – Updated: 2026-10-27 14:13

Title

Fclairamb ftpserverlib through 0.32.4 Cleartext FTPES Data Transfer via PROT P

Summary

Fclairamb ftpserverlib through 0.32.4 contains a cleartext transmission vulnerability because TransferOpen checks only the transferTLS flag set by PROT, not whether the prepared data connection uses TLS. When a client sends PROT P after PASV or PORT, file contents and directory listings cross the network unencrypted, even with mandatory encryption, letting on-path attackers read or modify them.

Severity

6.3 (Medium)


                        
                          CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

4.8 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-27 13:42 UTC

CWE

CWE-319 - Cleartext Transmission of Sensitive Information

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 6904 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/fclairamb/ftpserverlib/pull/685	patchissue-tracking
https://github.com/fclairamb/ftpserverlib/blob/v0…	technical-description
https://github.com/fclairamb/ftpserverlib/blob/v0…	technical-description
https://www.vulncheck.com/advisories/fclairamb-ft…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
fclairamb	ftpserverlib	Affected: 0 , ≤ 0.32.4 (semver)

Date Public

2026-10-23 00:00

Credits

Che Agg Truvat drakkan

Show details on NVD website

JSON

To clipboard

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                "id": "CVE-2026-116844",
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CVE-2026-116844 (GCVE-0-2026-116844)

Vulnerability from cvelistv5 – Published: 2026-10-27 00:34 – Updated: 2026-10-27 14:13

Title

Fclairamb ftpserverlib through 0.32.4 Cleartext FTPES Data Transfer via PROT P

Summary

Fclairamb ftpserverlib through 0.32.4 contains a cleartext transmission vulnerability because TransferOpen checks only the transferTLS flag set by PROT, not whether the prepared data connection uses TLS. When a client sends PROT P after PASV or PORT, file contents and directory listings cross the network unencrypted, even with mandatory encryption, letting on-path attackers read or modify them.

Severity

6.3 (Medium)


                        
                          CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

4.8 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-27 13:42 UTC

CWE

CWE-319 - Cleartext Transmission of Sensitive Information

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 6904 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/fclairamb/ftpserverlib/pull/685	patchissue-tracking
https://github.com/fclairamb/ftpserverlib/blob/v0…	technical-description
https://github.com/fclairamb/ftpserverlib/blob/v0…	technical-description
https://www.vulncheck.com/advisories/fclairamb-ft…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
fclairamb	ftpserverlib	Affected: 0 , ≤ 0.32.4 (semver)

Date Public

2026-10-23 00:00

Credits

Che Agg Truvat drakkan

Show details on NVD website

JSON

To clipboard

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Find a vulnerability

Search criteria

2 vulnerabilities found for ftpserverlib by fclairamb

CVE-2026-116844 (GCVE-0-2026-116844)

CVE-2026-116844 (GCVE-0-2026-116844)