CVE-2026-9547

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Source
https://cve.org/CVERecord?id=CVE-2026-9547
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-9547.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-9547
Aliases
Downstream
ALPINE (1)
BELL (1)
CGA (21)
DEBIAN (1)
ECHO (1)
JLSEC (1)
MINI (2)
OESA (5)
openSUSE (2)
RHSA (5)
RLSA (1)
ROOT (8)
SUSE (8)
UBUNTU (1)
Related
ALSA (1)
openSUSE (2)
SUSE (8)
Published
2026-07-03T06:18:44Z
Modified
2026-10-08T07:15:44Z
Severity
  • 7.4 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
Summary
SSH improper host validation
Details

When a libcurl-based application performs transfers via SCP:// or SFTP:// and utilizes the CURLOPT_SSH_KEYFUNCTION callback, it may silently accept an untrusted server. This vulnerability occurs when a server presents a host key type that does not match the specific key type already recorded for that host in the known_hosts file. Instead of rejecting the mismatch, the callback mechanism fails to properly enforce the restriction, allowing the connection to succeed without warning and risking a potential man-in-the-middle attack.

Database specific 
{
    "cna_assigner":  "curl",
    "cwe_ids":  [
        "CWE-297"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/9xxx/CVE-2026-9547.json"
}
References

Affected packages

Git / github.com/curl/curl

Affected ranges

Type
GIT
Repo
https://github.com/curl/curl
Events
Introduced
b8d1366852fd0034374c5de1e4968c7a224f77cc
Fixed
68720b4837284335b2d63cb358f8f6ce65f5bc55
Database specific
Show details 
{
    "cpe":  "cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*",
    "extracted_events":  [
        {
            "introduced":  "7.69.0"
        },
        {
            "fixed":  "8.21.0"
        }
    ],
    "source":  "CPE_RANGE"
}
Type
GIT
Repo
https://github.com/curl/curl.git
Events
Introduced
507cf6a13db0375eadd4655b4c64710db29e9cf2
Fixed
0b8dbbc63c98777e4584cb9fbd71df3464008ad1

Affected versions

7.*
7.69.0
7.69.1
7.70.0
7.71.0
7.71.1
7.72.0
7.73.0
7.74.0
7.75.0
7.76.0
7.76.1
7.77.0
7.78.0
7.79.0
7.79.1
7.80.0
7.81.0
7.82.0
7.83.0
7.83.1
7.84.0
7.85.0
7.86.0
7.87.0
7.88.0
7.88.1
8.*
8.0.0
8.0.1
8.1.0
8.1.1
8.1.2
8.10.0
8.10.1
8.11.0
8.11.1
8.12.0
8.12.1
8.13.0
8.14.0
8.14.1
8.15.0
8.16.0
8.17.0
8.18.0
8.19.0
8.2.0
8.2.1
8.20.0
8.3.0
8.4.0
8.5.0
8.6.0
8.7.0
8.7.1
8.8.0
8.9.0
8.9.1
Other
curl-7_69_0
curl-7_69_1
curl-7_70_0
curl-7_71_0
curl-7_71_1
curl-7_72_0
curl-7_73_0
curl-7_74_0
curl-7_75_0
curl-7_76_0
curl-7_76_1
curl-7_77_0
curl-7_78_0
curl-7_79_0
curl-7_79_1
curl-7_80_0
curl-7_81_0
curl-7_82_0
curl-7_83_0
curl-7_83_1
curl-7_84_0
curl-7_85_0
curl-7_86_0
curl-7_87_0
curl-7_88_0
curl-7_88_1
curl-8_0_0
curl-8_0_1
curl-8_10_0
curl-8_10_1
curl-8_11_0
curl-8_11_1
curl-8_12_0
curl-8_12_1
curl-8_13_0
curl-8_14_0
curl-8_14_1
curl-8_15_0
curl-8_16_0
curl-8_17_0
curl-8_18_0
curl-8_19_0
curl-8_1_0
curl-8_1_1
curl-8_1_2
curl-8_20_0
curl-8_2_0
curl-8_2_1
curl-8_3_0
curl-8_4_0
curl-8_5_0
curl-8_6_0
curl-8_7_0
curl-8_7_1
curl-8_8_0
curl-8_9_0
curl-8_9_1
rc-8_18_0-1
rc-8_18_0-2
rc-8_18_0-3
rc-8_19_0-1
rc-8_19_0-2
rc-8_19_0-3
rc-8_20_0-1
rc-8_20_0-2
rc-8_20_0-3
rc-8_21_0-1
rc-8_21_0-2
rc-8_21_0-3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-9547.json"
vanir_signatures 
[
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "171591672620915120098914005398439744356",
            "length":  4615
        },
        "id":  "CVE-2026-9547-e5ddacc0",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/curl/curl.git/commit/0b8dbbc63c98777e4584cb9fbd71df3464008ad1",
        "target":  {
            "file":  "lib/vssh/libssh.c",
            "function":  "myssh_is_known"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "19522727956082994505377891717732253881",
                "17505745399782688697084999810884215111",
                "65466782891270922555303879365870593631",
                "39998244195617753293703183793609467932"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2026-9547-ffd5c5b3",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/curl/curl.git/commit/0b8dbbc63c98777e4584cb9fbd71df3464008ad1",
        "target":  {
            "file":  "lib/vssh/libssh.c"
        }
    }
]
vanir_signatures_modified 
"2026-10-08T07:15:44Z"