CVE-2026-25479

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Source
https://cve.org/CVERecord?id=CVE-2026-25479
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-25479.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-25479
Aliases
Published
2026-02-09T18:48:19Z
Modified
2026-10-21T02:31:08Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N CVSS Calculator
Summary
Litestar has an AllowedHosts validation bypass due to unescaped regex metacharacters in configured host patterns
Details

Litestar is an Asynchronous Server Gateway Interface (ASGI) framework. Prior to 2.20.0, in litestar.middleware.allowed_hosts, allowlist entries are compiled into regex patterns in a way that allows regex metacharacters to retain special meaning (e.g., . matches any character). This enables a bypass where an attacker supplies a host that matches the regex but is not the intended literal hostname. This vulnerability is fixed in 2.20.0.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-185"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25479.json"
}
References

Affected packages

Git / github.com/litestar-org/litestar

Affected ranges

Type
GIT
Repo
https://github.com/litestar-org/litestar
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
b343d5a3e6310ecb778a406fa26fc8399139c704
Fixed
06b36f481d1bfea6f19995cfb4f203aba45c4ace
Database specific
Show details 
{
    "extracted_events":  [
        {
            "cpe":  "cpe:2.3:a:litestar:litestar:*:*:*:*:*:*:*:*",
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "2.20.0"
                }
            ],
            "source":  "CPE_RANGE"
        },
        {
            "range":  [
                {
                    "fixed":  "06b36f481d1bfea6f19995cfb4f203aba45c4ace"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "original_tag":  "v2.20.0",
            "range":  [
                {
                    "fixed":  "b343d5a3e6310ecb778a406fa26fc8399139c704"
                }
            ],
            "source":  "REFERENCES_TAG"
        }
    ]
}

Affected versions

0.*
0.7.2
v0.*
v0.0.1a
v0.1.0
v0.1.0b1
v0.1.1
v0.1.2
v0.1.3
v0.1.4
v0.1.5
v0.1.6
v0.2.0
v0.2.1
v0.3.0
v0.4.0
v0.4.1
v0.4.2
v0.4.3
v0.5.0
v0.6.0
v0.7.0
v0.7.1
v1.*
v1.0.0
v1.0.1
v1.0.2
v1.0.3
v1.0.4
v1.0.5
v1.1.0
v1.1.1
v1.10.0
v1.10.1
v1.11.0
v1.11.1
v1.12.0
v1.13.0
v1.13.1
v1.14.0
v1.14.1
v1.14.2
v1.15.0
v1.16.0
v1.16.1
v1.16.2
v1.17.0
v1.17.1
v1.17.2
v1.18.0
v1.18.1
v1.19.0
v1.2.0
v1.2.1
v1.2.2
v1.2.3
v1.2.4
v1.2.5
v1.20.0
v1.21.0
v1.21.1
v1.21.2
v1.22.0
v1.23.0
v1.23.1
v1.24.0
v1.25.0
v1.26.0
v1.26.1
v1.27.0
v1.28.0
v1.28.1
v1.29.0
v1.3.0
v1.3.1
v1.3.2
v1.3.3
v1.3.4
v1.3.5
v1.3.6
v1.3.7
v1.3.8
v1.3.9
v1.30.0
v1.31.0
v1.32.0
v1.33.0
v1.34.0
v1.35.0
v1.35.1
v1.36.0
v1.37.0
v1.38.0
v1.39.0
v1.4.0
v1.4.1
v1.4.2
v1.40.0
v1.40.1
v1.41.0
v1.42.0
v1.43.0
v1.43.1
v1.44.0
v1.45.0
v1.45.1
v1.46.0
v1.47.0
v1.48.0
v1.48.1
v1.49.0
v1.5.0
v1.5.1
v1.5.2
v1.5.3
v1.5.4
v1.50.0
v1.50.1
v1.50.2
v1.51.0
v1.6.0
v1.6.1
v1.6.2
v1.6.3
v1.7.0
v1.7.1
v1.7.3
v1.8.0
v1.8.1
v1.9.0
v1.9.1
v2.*
v2.0.0
v2.0.0alpha1
v2.0.0alpha2
v2.0.0alpha3
v2.0.0alpha4
v2.0.0alpha5
v2.0.0alpha6
v2.0.0alpha7
v2.0.0beta1
v2.0.0beta2
v2.0.0beta3
v2.0.0beta4
v2.0.0rc1
v2.1.0
v2.1.1
v2.10.0
v2.11.0
v2.12.0
v2.12.1
v2.13.0
v2.14.0
v2.15.0
v2.15.1
v2.15.2
v2.16.0
v2.17.0
v2.18.0
v2.19.0
v2.2.0
v2.2.1
v2.3.0
v2.3.1
v2.3.2
v2.4.0
v2.4.1
v2.4.2
v2.4.3
v2.4.4
v2.4.5
v2.5.0
v2.5.1
v2.5.2
v2.5.3
v2.5.4
v2.5.5
v2.6.0
v2.6.1
v2.6.2
v2.6.3
v2.7.0
v2.7.1
v2.8.0
v2.9.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-25479.json"