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vuln-cve/data/2026/89xxx/CVE-2026-89320.json
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{
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"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-89320",
"assignerOrgId": "e51fbebd-6053-4e49-959f-1b94eeb69a2c",
"state": "PUBLISHED",
"assignerShortName": "eclipse",
"dateReserved": "2026-09-11T13:55:59.296Z",
"datePublished": "2026-10-23T08:56:20.140Z",
"dateUpdated": "2026-11-02T13:29:45.468Z"
},
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"shortName": "eclipse",
"dateUpdated": "2026-10-23T08:56:20.140Z"
},
"title": "HmacShaCryptor.Hash never hashes its input — returns constant HMAC_K(\"\") for all inputs, voiding CBC-HMAC JWE integrity",
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"cweId": "CWE-354",
"description": "CWE-354 Improper Validation of Integrity Check Value",
"type": "CWE"
}
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"affected": [
{
"vendor": "Eclipse Foundation",
"product": "Eclipse KeyPont - GOSE",
"packageName": "github.com/ThalesGroup/gose",
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"lang": "en",
"value": "`HmacShaCryptor.Hash` never hashed its input. For any input it returned `HMAC_K(\"\")` — the MAC of the empty message under the key. Every AES-CBC-HMAC JWE produced or verified by gose therefore carried an authentication tag that is constant per key and independent of the message, removing ciphertext integrity entirely.",
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"value": "<p>`HmacShaCryptor.Hash` never hashed its input. For any input it returned `HMAC_K(\"\")` — the MAC of the empty message under the key. Every AES-CBC-HMAC JWE produced or verified by gose therefore carried an authentication tag that is constant per key and independent of the message, removing ciphertext integrity entirely.</p>"
}
]
}
],
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"url": "https://github.com/eclipse-keypont/gose/security/advisories/GHSA-h6w5-722x-2h3m"
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"attackComplexity": "LOW",
"attackRequirements": "NONE",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"vulnConfidentialityImpact": "LOW",
"subConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "HIGH",
"subIntegrityImpact": "NONE",
"vulnAvailabilityImpact": "NONE",
"subAvailabilityImpact": "NONE",
"exploitMaturity": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"valueDensity": "NOT_DEFINED",
"vulnerabilityResponseEffort": "NOT_DEFINED",
"providerUrgency": "NOT_DEFINED",
"version": "4.0",
"baseSeverity": "HIGH",
"baseScore": 8.8,
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N"
}
}
],
"credits": [
{
"lang": "en",
"value": "Eclipse Foundation Security Team",
"type": "finder"
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],
"source": {
"discovery": "UNKNOWN"
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"adp": [
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"url": "https://github.com/eclipse-keypont/gose/security/advisories/GHSA-h6w5-722x-2h3m",
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"other": {
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"content": {
"timestamp": "2026-11-02T13:28:39.896587Z",
"id": "CVE-2026-89320",
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],
"role": "CISA Coordinator",
"version": "2.0.3"
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],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-11-02T13:29:45.468Z"
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}