ML-KEM key lookup in Eclipse KeyPont crypto11 returns unrelated keys
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-345.
Summary
The crypto11 v2 Go module of Eclipse KeyPont from 2.0.0-rc3 through 2.0.0-rc8 looks up ML-KEM key pairs without verifying the public key against the private key (CWE-345). When the private key has no CKA_ID, the lookup returns the first ML-KEM public key on the token, so encapsulated shared secrets go to that key's owner. An attacker who can open an unauthenticated session on the token and plant a public CKK_ML_KEM object with the victim's CKA_ID and CKA_LABEL receives those shared secrets.
Written with Claude Haiku 5.5 from the sources below · 2026-11-06
Description from the CNA
In `github.com/eclipse-keypont/crypto11/v2` versions `>= 2.0.0-rc3, <= 2.0.0-rc8`, the ML-KEM key-pair lookup functions (`FindMLKEMKeyPair`, `FindMLKEMKeyPairs`, `FindMLKEMKeyPairsWithAttributes`) locate the public half of an ML-KEM key pair by `CKA_ID`/`CKA_LABEL` and never verify it against the private key. In addition, the "ID only" fallback search runs even when the private key has no `CKA_ID`, so the search template reduces to the public-key class and the ML-KEM key type and the first ML-KEM public key on the token is returned. `Encapsulate()` on the resulting key pair encrypts the fresh shared secret to that key, so its owner — not the holder of the private key the caller looked up — can recover the secret. An attacker who can open an unauthenticated session on the token and plant a public `CKK_ML_KEM` object carrying the victim's `CKA_ID`/`CKA_LABEL` receives the shared secrets for encapsulations performed through the substituted key pair, compromising the confidentiality of those secrets and of everything protected by keys derived from them. The v1 module paths have no ML-KEM support and are not affected.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Eclipse Foundation | Eclipse KeyPont | 2.0.0-rc3 – 2.0.0-rc8 | — | No fix listed | CNA |
- Eclipse KeyPont VendorEclipse Foundation Affected 2.0.0-rc3 – 2.0.0-rc8 Fixed in — No fix listed CNA
Remediation
No fixed version is listed for Eclipse KeyPont. Red Hat lists Red Hat Hardened Images as affected without a fix.
Written with Claude Haiku 5.5 from the sources below · 2026-11-06
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Hardened Images | Affected | — |
Timeline
- 2026-10-27 Threatist record created from CVE-2026-115408
- 2026-10-27 Alias added: GHSA-922w-gjph-r2q7
- 2026-10-28 Priority changed: MEDIUM → LOW
- 2026-11-04 CISA SSVC decision points changed
- 2026-11-04 Priority changed: LOW → MEDIUM
- 2026-11-06 Affected versions changed · Red Hat
- 2026-11-06 CVSS score added · Red Hat
References
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Sources
- CVE-2026-115408 · CVE Program
- CVE-2026-115408 · NVD
- FIRST EPSS
- GHSA-922w-gjph-r2q7 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-115408 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences