CVE-2026-42274

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Source
https://cve.org/CVERecord?id=CVE-2026-42274
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-42274.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-42274
Aliases
Downstream
Related
Published
2026-05-08T03:43:41Z
Modified
2026-10-16T02:34:35Z
Severity
  • 7.8 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N CVSS Calculator
Summary
Heimdall: Authorization bypass via path normalization mismatch
Details

Heimdall is a cloud native Identity Aware Proxy and Access Control Decision service. Prior to version 0.17.14, Heimdall performs rule matching on the raw (non-normalized) request path, while downstream components may normalize dot-segments according to RFC 3986, Section 6.2.2.3. This discrepancy can result in heimdall authorizing a request for one path (e.g., /user/../admin, or URL-encoded variants such as /user/%2e%2e/admin or /user/%2e%2e%2fadmin. The latter would require the allow_encoded_slashes option to be set to on or no_decode.) while the downstream ultimately processes a different, normalized path (/admin). This issue has been patched in version 0.17.14.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-35",
        "CWE-436"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42274.json"
}
References

Affected packages

Git / github.com/dadrus/heimdall

Affected ranges

Type
GIT
Repo
https://github.com/dadrus/heimdall
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
c89e65c0d7cc0c2456c067836614ab9190771088
Fixed
b5dfa484b7a8c2ce6d8691c026f9da867719947a
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "0.17.14"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "range":  [
                {
                    "fixed":  "b5dfa484b7a8c2ce6d8691c026f9da867719947a"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "original_tag":  "v0.17.14",
            "range":  [
                {
                    "fixed":  "c89e65c0d7cc0c2456c067836614ab9190771088"
                }
            ],
            "source":  "REFERENCES_TAG"
        }
    ]
}

Affected versions

v0.*
v0.1.0-alpha
v0.10.0-alpha
v0.10.1-alpha
v0.11.0-alpha
v0.11.1-alpha
v0.12.0-alpha
v0.13.0-alpha
v0.14.0-alpha
v0.15.0
v0.16.0
v0.17.0
v0.17.1
v0.17.10
v0.17.11
v0.17.12
v0.17.13
v0.17.2
v0.17.3
v0.17.4
v0.17.5
v0.17.6
v0.17.7
v0.17.8
v0.17.9
v0.2.0-alpha
v0.3.0-alpha
v0.4.0-alpha
v0.4.1-alpha
v0.5.0-alpha
v0.6.0-alpha
v0.6.1-alpha
v0.7.0-alpha
v0.8.0-alpha
v0.8.1-alpha
v0.8.2-alpha
v0.9.0-alpha
v0.9.1-alpha

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-42274.json"