CVE-2026-55455

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Source
https://cve.org/CVERecord?id=CVE-2026-55455
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55455.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-55455
Aliases
Published
2026-06-24T21:36:21.863Z
Modified
2026-07-08T08:26:09.227469649Z
Severity
  • 5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
Appsmith: SSRF in REST API / GraphQL datasource plugins via insufficient host denylist
Details

Appsmith is a platform to build admin panels, internal tools, and dashboards. Prior to 2.1, the outbound HTTP host filter applied by WebClientUtils (used by the REST API and GraphQL datasource plugins) validates hosts against an exact-match string denylist. The comprehensive address-class check (loopback, any-local, link-local, fc00::/7) exists only on a separate code path used by SMTP, not by the HTTP plugin path. As a result, an authenticated user can craft outbound requests that reach loopback-bound services inside the container. This vulnerability is fixed in 2.1.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55455.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-918"
    ]
}
References

Affected packages

Git / github.com/appsmithorg/appsmith

Affected ranges

Type
GIT
Repo
https://github.com/appsmithorg/appsmith
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
9293a9b5a19b948f0c06cb33ac053bcaaf62144b
Database specific 
{
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ],
    "cpe": "cpe:2.3:a:appsmith:appsmith:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "2.1"
        }
    ]
}

Affected versions

V1.*
V1.22
v.*
v.1.6.23
v.1.6.25
v1.*
v1.0
v1.0-beta.2
v1.0.1
v1.0.2
v1.1
v1.10
v1.11
v1.12
v1.13
v1.14
v1.15
v1.16
v1.17
v1.18
v1.19
v1.2
v1.2.1
v1.2.16
v1.2.2
v1.2.4
v1.20
v1.21
v1.22.1
v1.23
v1.24
v1.25
v1.26
v1.27
v1.28
v1.29
v1.30
v1.31
v1.32
v1.33
v1.34
v1.35
v1.36
v1.37
v1.38
v1.38.1
v1.39
v1.4.3
v1.4.4
v1.40
v1.41
v1.42
v1.43
v1.44
v1.45
v1.46
v1.47
v1.48
v1.49
v1.5.17
v1.50
v1.51
v1.52
v1.53
v1.54
v1.55
v1.56
v1.57
v1.58
v1.59
v1.6.10
v1.6.11
v1.6.12
v1.6.13
v1.6.14
v1.6.15
v1.6.16
v1.6.17
v1.6.18
v1.6.19
v1.6.20
v1.6.21
v1.6.3
v1.6.4
v1.6.5
v1.6.6
v1.6.7
v1.6.8
v1.6.9
v1.60
v1.61
v1.62
v1.63
v1.64
v1.65
v1.66
v1.67
v1.68
v1.69
v1.7.0
v1.7.1
v1.7.10
v1.7.11
v1.7.12
v1.7.13
v1.7.14
v1.7.4
v1.7.5
v1.7.6
v1.7.7
v1.7.8
v1.7.9
v1.70
v1.71
v1.72
v1.73
v1.74
v1.75
v1.76
v1.77
v1.78
v1.79
v1.8.0
v1.8.1
v1.8.10
v1.8.11
v1.8.12
v1.8.13
v1.8.14
v1.8.14.1
v1.8.15
v1.8.2
v1.8.3
v1.8.4
v1.8.5
v1.8.6
v1.8.7
v1.8.8
v1.8.9
v1.80
v1.81
v1.82
v1.83
v1.84
v1.85
v1.86
v1.88
v1.89
v1.9.0
v1.9.1
v1.9.10
v1.9.11
v1.9.12
v1.9.13
v1.9.14
v1.9.15
v1.9.16
v1.9.17
v1.9.18
v1.9.19
v1.9.2
v1.9.20
v1.9.20.2
v1.9.20.3
v1.9.20.4
v1.9.21
v1.9.22
v1.9.23
v1.9.24
v1.9.25
v1.9.26
v1.9.27
v1.9.28
v1.9.29
v1.9.3
v1.9.3.1
v1.9.30
v1.9.31
v1.9.32
v1.9.33
v1.9.34
v1.9.35
v1.9.36
v1.9.37
v1.9.37.1
v1.9.38
v1.9.39
v1.9.4
v1.9.40
v1.9.41
v1.9.42
v1.9.43
v1.9.44
v1.9.45
v1.9.46
v1.9.47
v1.9.48
v1.9.49
v1.9.5
v1.9.50
v1.9.51
v1.9.52
v1.9.53
v1.9.54
v1.9.55
v1.9.56
v1.9.57
v1.9.58
v1.9.6
v1.9.60
v1.9.61
v1.9.7
v1.9.8
v1.9.9
v1.90
v1.91
v1.92
v1.93
v1.94
v1.95
v1.96
v1.97
v1.98
v1.99
v2.*
v2.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55455.json"