CVE-2026-59847

A flaw was found in libssh. Incorrect AES-GCM finalization checks in builds using the OpenSSL backend can effectively remove integrity protection, allowing an in-path attacker to modify plaintext on the wire without detection.

Database specific

{
    "cna_assigner": "redhat",
    "cwe_ids": [
        "CWE-253"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59847.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "range": [
                        {
                            "fixed": "0:0.12.0-3.el10_2"
                        },
                        {
                            "fixed": "0:0.9.6-17.el8_10"
                        },
                        {
                            "fixed": "0:0.9.6-17.el8_10"
                        },
                        {
                            "fixed": "0:0.10.4-19.el9_8"
                        },
                        {
                            "fixed": "0:0.10.4-19.el9_8"
                        },
                        {
                            "fixed": "0.12.1-4.hum1"
                        }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "InverseAffectedRanges"
                }
            ]
        }
    ]
}

References

Affected packages

Git / gitlab.com/libssh/libssh-mirror

Affected ranges

Type

GIT

Repo

https://gitlab.com/libssh/libssh-mirror

Events

Introduced

79900e5246da9a1712d8822a53aaf5fd0abc6f40

Fixed

a09fdd00416e53b6ed436df6ff14339a4f884601

Introduced

50313883f3a077458cde4ea95bf46bfeb0771b34

Last Affected

50313883f3a077458cde4ea95bf46bfeb0771b34

Database specific

Show details

{
    "extracted_events": [
        {
            "cpe": "cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:*",
            "range": [
                {
                    "introduced": "0.9.0"
                },
                {
                    "fixed": "0.11.5"
                }
            ],
            "source": "CPE_RANGE"
        },
        {
            "cpe": "cpe:2.3:a:libssh:libssh:0.12.0:*:*:*:*:*:*:*",
            "range": [
                {
                    "introduced": "0.12.0"
                },
                {
                    "last_affected": "0.12.0"
                }
            ],
            "source": "CPE_STRING"
        }
    ]
}

Affected versions

0.*

0.12.0

libssh-0.*

libssh-0.12.0

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-59847.json"