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  4. CVE 2026 89320 hmacshacryptorhash never hashes its input returns
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Back to active CVEs
High · CVSS 8.8CVE-2026-89320

HmacShaCryptor.Hash never hashes its input — returns constant HMAC_K("") for all inputs, voiding CBC-HMAC JWE integrityCVE-2026-89320

Answer in brief

CVE-2026-89320 records a High severity (CVSS 8.8) vulnerability in HmacShaCryptor.Hash never hashes its input — returns constant HMAC_K("") for all inputs, voiding CBC-HMAC JWE integrity. The current sources do not mark it as known exploited. The current feed maps Eclipse Foundation/Eclipse KeyPont - GOSE (generic), Eclipse Foundation/Eclipse KeyPont - GOSE (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 23, 2026Updated Oct 23, 2026Source checked Oct 25, 2026First seen by HOL Oct 23, 2026Material review Oct 23, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.8
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Eclipse Foundation/Eclipse KeyPont - GOSE (generic), Eclipse Foundation/Eclipse KeyPont - GOSE (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Eclipse Foundation/Eclipse KeyPont - GOSEgeneric>=0.9.0 <=0.13.0-rc1Not reported
Eclipse Foundation/Eclipse KeyPont - GOSEgeneric>=0 <1.0.0-rc11.0.0-rc1

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Eclipse Foundation/Eclipse KeyPont - GOSE, Eclipse Foundation/Eclipse KeyPont - GOSE.
  2. 2Review the reported fix. Update Eclipse Foundation/Eclipse KeyPont - GOSE to 1.0.0-rc1 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 23, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 23, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 23, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
Upstream source description

`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.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-354
Source
CVE List V5
Source checked
Oct 25, 2026
References
1 linked source
Open source record