CVE-2026-0573 (GCVE-0-2026-0573)
Vulnerability from cvelistv5 – Published: 2026-02-18 20:37 – Updated: 2026-02-18 21:20
VLAI?
Title
Improper Handling of HTTP Redirects vulnerability was identified in GitHub Enterprise Server that allowed leaking of authorization token and enabled remote code execution
Summary
An URL redirection vulnerability was identified in GitHub Enterprise Server that allowed attacker-controlled redirects to leak sensitive authorization tokens. The repository_pages API insecurely followed HTTP redirects when fetching artifact URLs, preserving the authorization header containing a privileged JWT. An authenticated user could redirect these requests to an attacker-controlled domain, exfiltrate the Actions.ManageOrgs JWT, and leverage it for potential remote code execution. Attackers would require access to the target GitHub Enterprise Server instance and the ability to exploit a legacy redirect to an attacker-controlled domain. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.19 and was fixed in versions 3.19.2, 3.18.4, 3.17.10, 3.16.13, 3.15.17, and 3.14.22. This vulnerability was reported via the GitHub Bug Bounty program.
Severity ?
CWE
- CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| GitHub | Enterprise Server |
Affected:
3.14 , ≤ 3.14.21
(semver)
Affected: 3.15 , ≤ 3.15.16 (semver) Affected: 3.16 , ≤ 3.16.12 (semver) Affected: 3.17 , ≤ 3.17.9 (semver) Affected: 3.18 , ≤ 3.18.3 (semver) Affected: 3.19 , ≤ 3.19.1 (semver) |
Credits
R31n
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-0573",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-02-18T21:18:26.120107Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-02-18T21:20:02.732Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "affected",
"product": "Enterprise Server",
"vendor": "GitHub",
"versions": [
{
"changes": [
{
"at": "3.14.22",
"status": "unaffected"
}
],
"lessThanOrEqual": "3.14.21",
"status": "affected",
"version": "3.14",
"versionType": "semver"
},
{
"changes": [
{
"at": "3.15.17",
"status": "unaffected"
}
],
"lessThanOrEqual": "3.15.16",
"status": "affected",
"version": "3.15",
"versionType": "semver"
},
{
"changes": [
{
"at": "3.16.13",
"status": "unaffected"
}
],
"lessThanOrEqual": "3.16.12",
"status": "affected",
"version": "3.16",
"versionType": "semver"
},
{
"changes": [
{
"at": "3.17.10",
"status": "unaffected"
}
],
"lessThanOrEqual": "3.17.9",
"status": "affected",
"version": "3.17",
"versionType": "semver"
},
{
"changes": [
{
"at": "3.18.4",
"status": "unaffected"
}
],
"lessThanOrEqual": "3.18.3",
"status": "affected",
"version": "3.18",
"versionType": "semver"
},
{
"changes": [
{
"at": "3.19.2",
"status": "unaffected"
}
],
"lessThanOrEqual": "3.19.1",
"status": "affected",
"version": "3.19",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "R31n"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cspan style=\"background-color: rgba(129, 139, 152, 0.12);\"\u003eAn URL redirection vulnerability was identified in GitHub Enterprise Server that allowed attacker-controlled redirects to leak sensitive authorization tokens. The repository_pages API insecurely followed HTTP redirects when fetching artifact URLs, preserving the authorization header containing a privileged JWT. An authenticated user could redirect these requests to an attacker-controlled domain, exfiltrate the Actions.ManageOrgs JWT, and leverage it for potential remote code execution. Attackers would require access to the target GitHub Enterprise Server instance and the ability to exploit a legacy redirect to an attacker-controlled domain. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.19 and was fixed in versions 3.19.2, 3.18.4, 3.17.10, 3.16.13, 3.15.17, and 3.14.22. This vulnerability was reported via the GitHub Bug Bounty program.\u003c/span\u003e\u003cbr\u003e"
}
],
"value": "An URL redirection vulnerability was identified in GitHub Enterprise Server that allowed attacker-controlled redirects to leak sensitive authorization tokens. The repository_pages API insecurely followed HTTP redirects when fetching artifact URLs, preserving the authorization header containing a privileged JWT. An authenticated user could redirect these requests to an attacker-controlled domain, exfiltrate the Actions.ManageOrgs JWT, and leverage it for potential remote code execution. Attackers would require access to the target GitHub Enterprise Server instance and the ability to exploit a legacy redirect to an attacker-controlled domain. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.19 and was fixed in versions 3.19.2, 3.18.4, 3.17.10, 3.16.13, 3.15.17, and 3.14.22. This vulnerability was reported via the GitHub Bug Bounty program."
}
],
"impacts": [
{
"capecId": "CAPEC-178",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-178 Cross-Site Flashing"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 7.6,
"baseSeverity": "HIGH",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "LOW",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-601",
"description": "CWE-601 URL Redirection to Untrusted Site (\u0027Open Redirect\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-02-18T20:37:39.601Z",
"orgId": "82327ea3-741d-41e4-88f8-2cf9e791e760",
"shortName": "GitHub_P"
},
"references": [
{
"tags": [
"release-notes"
],
"url": "https://docs.github.com/en/enterprise-server@3.14/admin/release-notes#3.14.22"
},
{
"tags": [
"release-notes"
],
"url": "https://docs.github.com/en/enterprise-server@3.15/admin/release-notes#3.15.17"
},
{
"tags": [
"release-notes"
],
"url": "https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.13"
},
{
"tags": [
"release-notes"
],
"url": "https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.10"
},
{
"tags": [
"release-notes"
],
"url": "https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.4"
},
{
"tags": [
"release-notes"
],
"url": "https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.2"
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "Improper Handling of HTTP Redirects vulnerability was identified in GitHub Enterprise Server that allowed leaking of authorization token and enabled remote code execution",
"x_generator": {
"engine": "Vulnogram 0.5.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "82327ea3-741d-41e4-88f8-2cf9e791e760",
"assignerShortName": "GitHub_P",
"cveId": "CVE-2026-0573",
"datePublished": "2026-02-18T20:37:39.601Z",
"dateReserved": "2026-01-02T16:56:23.289Z",
"dateUpdated": "2026-02-18T21:20:02.732Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2026-0573\",\"sourceIdentifier\":\"product-cna@github.com\",\"published\":\"2026-02-18T21:16:22.470\",\"lastModified\":\"2026-02-18T21:16:22.470\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"An URL redirection vulnerability was identified in GitHub Enterprise Server that allowed attacker-controlled redirects to leak sensitive authorization tokens. The repository_pages API insecurely followed HTTP redirects when fetching artifact URLs, preserving the authorization header containing a privileged JWT. An authenticated user could redirect these requests to an attacker-controlled domain, exfiltrate the Actions.ManageOrgs JWT, and leverage it for potential remote code execution. Attackers would require access to the target GitHub Enterprise Server instance and the ability to exploit a legacy redirect to an attacker-controlled domain. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.19 and was fixed in versions 3.19.2, 3.18.4, 3.17.10, 3.16.13, 3.15.17, and 3.14.22. This vulnerability was reported via the GitHub Bug Bounty program.\"}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"product-cna@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X\",\"baseScore\":7.6,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"PRESENT\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"HIGH\",\"vulnIntegrityImpact\":\"HIGH\",\"vulnAvailabilityImpact\":\"NONE\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"NOT_DEFINED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}]},\"weaknesses\":[{\"source\":\"product-cna@github.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-601\"}]}],\"references\":[{\"url\":\"https://docs.github.com/en/enterprise-server@3.14/admin/release-notes#3.14.22\",\"source\":\"product-cna@github.com\"},{\"url\":\"https://docs.github.com/en/enterprise-server@3.15/admin/release-notes#3.15.17\",\"source\":\"product-cna@github.com\"},{\"url\":\"https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.13\",\"source\":\"product-cna@github.com\"},{\"url\":\"https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.10\",\"source\":\"product-cna@github.com\"},{\"url\":\"https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.4\",\"source\":\"product-cna@github.com\"},{\"url\":\"https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.2\",\"source\":\"product-cna@github.com\"}]}}",
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-0573\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-02-18T21:18:26.120107Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-02-18T21:18:36.138Z\"}}], \"cna\": {\"title\": \"Improper Handling of HTTP Redirects vulnerability was identified in GitHub Enterprise Server that allowed leaking of authorization token and enabled remote code execution\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"R31n\"}], \"impacts\": [{\"capecId\": \"CAPEC-178\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC-178 Cross-Site Flashing\"}]}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"Safety\": \"NOT_DEFINED\", \"version\": \"4.0\", \"Recovery\": \"NOT_DEFINED\", \"baseScore\": 7.6, \"Automatable\": \"NOT_DEFINED\", \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"valueDensity\": \"NOT_DEFINED\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N\", \"exploitMaturity\": \"NOT_DEFINED\", \"providerUrgency\": \"NOT_DEFINED\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"PRESENT\", \"privilegesRequired\": \"LOW\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"HIGH\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"NONE\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"HIGH\", \"vulnerabilityResponseEffort\": \"NOT_DEFINED\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"GitHub\", \"product\": \"Enterprise Server\", \"versions\": [{\"status\": \"affected\", \"changes\": [{\"at\": \"3.14.22\", \"status\": \"unaffected\"}], \"version\": \"3.14\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"3.14.21\"}, {\"status\": \"affected\", \"changes\": [{\"at\": \"3.15.17\", \"status\": \"unaffected\"}], \"version\": \"3.15\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"3.15.16\"}, {\"status\": \"affected\", \"changes\": [{\"at\": \"3.16.13\", \"status\": \"unaffected\"}], \"version\": \"3.16\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"3.16.12\"}, {\"status\": \"affected\", \"changes\": [{\"at\": \"3.17.10\", \"status\": \"unaffected\"}], \"version\": \"3.17\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"3.17.9\"}, {\"status\": \"affected\", \"changes\": [{\"at\": \"3.18.4\", \"status\": \"unaffected\"}], \"version\": \"3.18\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"3.18.3\"}, {\"status\": \"affected\", \"changes\": [{\"at\": \"3.19.2\", \"status\": \"unaffected\"}], \"version\": \"3.19\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"3.19.1\"}], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://docs.github.com/en/enterprise-server@3.14/admin/release-notes#3.14.22\", \"tags\": [\"release-notes\"]}, {\"url\": \"https://docs.github.com/en/enterprise-server@3.15/admin/release-notes#3.15.17\", \"tags\": [\"release-notes\"]}, {\"url\": \"https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.13\", \"tags\": [\"release-notes\"]}, {\"url\": \"https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.10\", \"tags\": [\"release-notes\"]}, {\"url\": \"https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.4\", \"tags\": [\"release-notes\"]}, {\"url\": \"https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.2\", \"tags\": [\"release-notes\"]}], \"x_generator\": {\"engine\": \"Vulnogram 0.5.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"An URL redirection vulnerability was identified in GitHub Enterprise Server that allowed attacker-controlled redirects to leak sensitive authorization tokens. The repository_pages API insecurely followed HTTP redirects when fetching artifact URLs, preserving the authorization header containing a privileged JWT. An authenticated user could redirect these requests to an attacker-controlled domain, exfiltrate the Actions.ManageOrgs JWT, and leverage it for potential remote code execution. Attackers would require access to the target GitHub Enterprise Server instance and the ability to exploit a legacy redirect to an attacker-controlled domain. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.19 and was fixed in versions 3.19.2, 3.18.4, 3.17.10, 3.16.13, 3.15.17, and 3.14.22. This vulnerability was reported via the GitHub Bug Bounty program.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cspan style=\\\"background-color: rgba(129, 139, 152, 0.12);\\\"\u003eAn URL redirection vulnerability was identified in GitHub Enterprise Server that allowed attacker-controlled redirects to leak sensitive authorization tokens. The repository_pages API insecurely followed HTTP redirects when fetching artifact URLs, preserving the authorization header containing a privileged JWT. An authenticated user could redirect these requests to an attacker-controlled domain, exfiltrate the Actions.ManageOrgs JWT, and leverage it for potential remote code execution. Attackers would require access to the target GitHub Enterprise Server instance and the ability to exploit a legacy redirect to an attacker-controlled domain. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.19 and was fixed in versions 3.19.2, 3.18.4, 3.17.10, 3.16.13, 3.15.17, and 3.14.22. This vulnerability was reported via the GitHub Bug Bounty program.\u003c/span\u003e\u003cbr\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-601\", \"description\": \"CWE-601 URL Redirection to Untrusted Site (\u0027Open Redirect\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"82327ea3-741d-41e4-88f8-2cf9e791e760\", \"shortName\": \"GitHub_P\", \"dateUpdated\": \"2026-02-18T20:37:39.601Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-0573\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-02-18T21:20:02.732Z\", \"dateReserved\": \"2026-01-02T16:56:23.289Z\", \"assignerOrgId\": \"82327ea3-741d-41e4-88f8-2cf9e791e760\", \"datePublished\": \"2026-02-18T20:37:39.601Z\", \"assignerShortName\": \"GitHub_P\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
Loading…