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FKIE_CVE-2026-84185

Vulnerability from fkie_nvd - Published: 2026-09-03 21:17 - Updated: 2026-09-03 21:17
Severity
5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N
Summary
A flaw was found in the jwcrypto library, which is used for implementing Javascript Object Signing and Encryption (JOSE) standards. The issue occurs when the library verifies a General JSON Serialization JWS using a set of keys. Due to a coding error, the library fails to correctly identify the specific key ID (kid) and may instead accept a signature made by any valid key in the set. This can allow an attacker with a valid key to bypass authorization checks in applications that rely on the key ID to identify specific tenants or users.
References
secalert@redhat.comhttps://access.redhat.com/security/cve/CVE-2026-84185
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2526729
Impacted products
Vendor Product Version
To clipboard 

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  "cveTags": [],
  "descriptions": [
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      "lang": "en",
      "value": "A flaw was found in the jwcrypto library, which is used for implementing Javascript Object Signing and Encryption (JOSE) standards. The issue occurs when the library verifies a General JSON Serialization JWS using a set of keys. Due to a coding error, the library fails to correctly identify the specific key ID (kid) and may instead accept a signature made by any valid key in the set. This can allow an attacker with a valid key to bypass authorization checks in applications that rely on the key ID to identify specific tenants or users."
    }
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  "id": "CVE-2026-84185",
  "lastModified": "2026-09-03T21:17:22.687",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.9,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N",
          "version": "3.1"
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        "exploitabilityScore": 1.6,
        "impactScore": 4.2,
        "source": "secalert@redhat.com",
        "type": "Primary"
      }
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  },
  "published": "2026-09-03T21:17:22.687",
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      "url": "https://access.redhat.com/security/cve/CVE-2026-84185"
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  "vulnStatus": "Received",
  "weaknesses": [
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      "description": [
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          "lang": "en",
          "value": "CWE-347"
        }
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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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