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CVE-2026-89317— JwtVerifierImpl.Verify does not enforce the JWS `crit` header (RFC 7515 §4.1.11)

Quick assessment

Affected
Eclipse Foundation Eclipse KeyPont - GOSE
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

gose 将 JWS 的 头解析到了 字段，但之后从未读取该字段。RFC 7515 第 4.1.11 节要求接收方必须拒绝那些包含其无法理解的所列关键扩展参数的 JWS。由于 gose 未实现任何头扩展，因此所有携带非空 字段的令牌本应被拒绝，但实际上却未被拒绝。

CVSS 6.3 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-89317

Vulnerability Information
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Vulnerability Title
JwtVerifierImpl.Verify does not enforce the JWS `crit` header (RFC 7515 §4.1.11)
Source: CVE Program / CVE List V5
Vulnerability Description
gose parsed the JWS `crit` header into `JwsHeader.Crit` and then never read it. RFC 7515 §4.1.11 requires a recipient to reject a JWS whose listed critical extension parameters it does not understand. gose implements no header extensions, so every token carrying a non-empty `crit` should have been rejected — and none were.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Eclipse Foundation Eclipse KeyPont - GOSE 0.7.3 ~ 0.13.0-rc1 -
Eclipse Foundation Eclipse KeyPont - GOSE 0 ~ 1.0.0-rc4 -

II. Public POCs for CVE-2026-89317

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III. Intelligence Information for CVE-2026-89317

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Other References for CVE-2026-89317 (1)

Same Patch Batch · Eclipse Foundation · 2026-10-23 · 9 CVEs total

CVE-2026-89320 8.8 HIGH HmacShaCryptor.Hash never hashes its input — returns constant HMAC_K("") for all inputs, v
CVE-2026-89318 6.9 MEDIUM JweRsaKeyEncryptionDecryptorImpl.Decrypt panics on attacker-chosen IV length (stdlib GCM.O
CVE-2026-89315 6.9 MEDIUM JwtClaims.MarshalJSON panics via reflect.StructOf when any untyped claim key is not a vali
CVE-2026-89314 6.9 MEDIUM Quadratic-time key_ops duplicate check lets a sub-1 MB JWKS body pin a CPU core for ~15 s
CVE-2026-89312 6.9 MEDIUM AesGcmCryptor.Open passes attacker-controlled nonce to cipher.AEAD.Open without length che
CVE-2026-89319 6.3 MEDIUM JweDirectDecryptorBlock.Decrypt: unchecked _thales_aad length header reachable with forged
CVE-2026-89316 6.3 MEDIUM LoadPublicKey panics on kty/alg mismatch (kty=EC with a non-EC alg) via unchecked *ECDSAOp
CVE-2026-89313 6.3 MEDIUM JwksTrustStore.Get returns the last fetched JWKS key (err=nil) when the requested kid is a

IV. Related Vulnerabilities

Same product: Eclipse KeyPont - GOSE
Same vendor: Eclipse Foundation
Same weakness: CWE-20

V. Comments for CVE-2026-89317

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