CVE-2026-89320HmacShaCryptor.Hash never hashes its input — returns constant HMAC_K("") for all inputs, voiding CBC-HMAC JWE integrity
Updated under an hour ago ()
Does this affect you?
It affects Eclipse Foundation Eclipse KeyPont - GOSE. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.17%, higher than 7% of scored CVEs.
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`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.
- CVSS
- 8.8 HIGH (v4.0, CNA)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
- Weakness (CWE)
- CWE-354
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.17% (percentile 7)
- Assigned by
- eclipse
- NVD analysis
- Deferred
- Record last updated
- Oct 23, 2026
- First seen by InfoSec Signals
- Oct 23, 2026
Affected products
Eclipse Foundation Eclipse KeyPont - GOSE eclipse_foundation:eclipse_keypont_gose (from the name) | from 0.9.0 through 0.13.0-rc1 | CNA record |
References
- https://github.com/eclipse-keypont/gose/security/advisories/GHSA-h6w5-722x-2h3m
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.