CVE-2026-42272 (GCVE-0-2026-42272)
Vulnerability from cvelistv5
Published
2026-05-08 03:40
Modified
2026-05-08 23:12
Severity ?
VLAI Severity ?
EPSS score ?
Summary
Heimdall is a cloud native Identity Aware Proxy and Access Control Decision service. Prior to version 0.17.14, Heimdall handles URL-encoded slashes (%2F) in a case-sensitive manner, while percent-encoding is defined to be case-insensitive. As a result, the lowercase equivalent (%2f) is not recognized and therefore not processed as expected when allow_encoded_slashes is set to off (the default setting). This discrepancy can lead to differences in how request paths are interpreted by heimdall and upstream components, which may result in authorization bypass. This issue has been patched in version 0.17.14.
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-42272",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-08T23:12:19.653095Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-05-08T23:12:35.366Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "heimdall",
"vendor": "dadrus",
"versions": [
{
"status": "affected",
"version": "\u003c 0.17.14"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Heimdall is a cloud native Identity Aware Proxy and Access Control Decision service. Prior to version 0.17.14, Heimdall handles URL-encoded slashes (%2F) in a case-sensitive manner, while percent-encoding is defined to be case-insensitive. As a result, the lowercase equivalent (%2f) is not recognized and therefore not processed as expected when allow_encoded_slashes is set to off (the default setting). This discrepancy can lead to differences in how request paths are interpreted by heimdall and upstream components, which may result in authorization bypass. This issue has been patched in version 0.17.14."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "HIGH",
"subIntegrityImpact": "HIGH",
"userInteraction": "NONE",
"vectorString": "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",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-436",
"description": "CWE-436: Interpretation Conflict",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-178",
"description": "CWE-178: Improper Handling of Case Sensitivity",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-08T03:40:17.541Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/dadrus/heimdall/security/advisories/GHSA-43jv-5j4x-qv67",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/dadrus/heimdall/security/advisories/GHSA-43jv-5j4x-qv67"
},
{
"name": "https://github.com/dadrus/heimdall/pull/3207",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/dadrus/heimdall/pull/3207"
},
{
"name": "https://github.com/dadrus/heimdall/commit/8b0de6aba23a047cfee3081df878271bb17f4351",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/dadrus/heimdall/commit/8b0de6aba23a047cfee3081df878271bb17f4351"
},
{
"name": "https://github.com/dadrus/heimdall/releases/tag/v0.17.14",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/dadrus/heimdall/releases/tag/v0.17.14"
}
],
"source": {
"advisory": "GHSA-43jv-5j4x-qv67",
"discovery": "UNKNOWN"
},
"title": "Heimdall: Case-sensitive handling of URL-encoded slashes may lead to inconsistent path interpretation"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-42272",
"datePublished": "2026-05-08T03:40:17.541Z",
"dateReserved": "2026-04-26T11:53:27.707Z",
"dateUpdated": "2026-05-08T23:12:35.366Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-42272\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-05-08T23:12:19.653095Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-05-08T23:12:28.874Z\"}}], \"cna\": {\"title\": \"Heimdall: Case-sensitive handling of URL-encoded slashes may lead to inconsistent path interpretation\", \"source\": {\"advisory\": \"GHSA-43jv-5j4x-qv67\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 7.8, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"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\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"NONE\", \"privilegesRequired\": \"NONE\", \"subIntegrityImpact\": \"HIGH\", \"vulnIntegrityImpact\": \"NONE\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"NONE\", \"subConfidentialityImpact\": \"HIGH\", \"vulnConfidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"dadrus\", \"product\": \"heimdall\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003c 0.17.14\"}]}], \"references\": [{\"url\": \"https://github.com/dadrus/heimdall/security/advisories/GHSA-43jv-5j4x-qv67\", \"name\": \"https://github.com/dadrus/heimdall/security/advisories/GHSA-43jv-5j4x-qv67\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/dadrus/heimdall/pull/3207\", \"name\": \"https://github.com/dadrus/heimdall/pull/3207\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/dadrus/heimdall/commit/8b0de6aba23a047cfee3081df878271bb17f4351\", \"name\": \"https://github.com/dadrus/heimdall/commit/8b0de6aba23a047cfee3081df878271bb17f4351\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/dadrus/heimdall/releases/tag/v0.17.14\", \"name\": \"https://github.com/dadrus/heimdall/releases/tag/v0.17.14\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Heimdall is a cloud native Identity Aware Proxy and Access Control Decision service. Prior to version 0.17.14, Heimdall handles URL-encoded slashes (%2F) in a case-sensitive manner, while percent-encoding is defined to be case-insensitive. As a result, the lowercase equivalent (%2f) is not recognized and therefore not processed as expected when allow_encoded_slashes is set to off (the default setting). This discrepancy can lead to differences in how request paths are interpreted by heimdall and upstream components, which may result in authorization bypass. This issue has been patched in version 0.17.14.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-436\", \"description\": \"CWE-436: Interpretation Conflict\"}]}, {\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-178\", \"description\": \"CWE-178: Improper Handling of Case Sensitivity\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-05-08T03:40:17.541Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-42272\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-08T23:12:35.366Z\", \"dateReserved\": \"2026-04-26T11:53:27.707Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-05-08T03:40:17.541Z\", \"assignerShortName\": \"GitHub_M\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…