Medium severity · published Oct 23, 2026
CVE-2026-89316
LoadPublicKey panics on kty/alg mismatch (kty=EC with a non-EC alg) via unchecked *ECDSAOptions type assertion
New
6.3
CVSS
0.2%
EPSS
No
On KEV
Description
`LoadPublicKey` resolved an EC key's curve with an unchecked type assertion, `algToOptsMap[alg].(*ECDSAOptions)`. A JWK declaring `"kty":"EC"` together with a non-EC `"alg"` — which RFC 7517 §4.4 permits — reaches that assertion and **panics**.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 11% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EK
Eclipse KeyPont - GOSE · Eclipse Foundation
0.7.3 through 0.13.0-rc1; before 1.0.0-rc4 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89316
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-89316
github.com
https://github.com/eclipse-keypont/gose/security/advisories/GHSA-fv39-8484-f4wr
More from Eclipse KeyPont - GOSE
8.8
CVE-2026-89320
HmacShaCryptor.Hash never hashes its input — returns constant HMAC_K("") for all inputs, voiding CBC-HMAC JWE integrity
6.9
CVE-2026-89318
JweRsaKeyEncryptionDecryptorImpl.Decrypt panics on attacker-chosen IV length (stdlib GCM.Open reached without nonce-size check)
6.9
CVE-2026-89315
JwtClaims.MarshalJSON panics via reflect.StructOf when any untyped claim key is not a valid Go identifier suffix
6.9
CVE-2026-89314
Quadratic-time key_ops duplicate check lets a sub-1 MB JWKS body pin a CPU core for ~15 s
6.9
CVE-2026-89312
AesGcmCryptor.Open passes attacker-controlled nonce to cipher.AEAD.Open without length check, causing panic on wrong-size IV