EUVD-2026-74623
GHSA-qmhp-mcqx-7ppw
Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Network timing attack requires no auth but demands many timed measurements (AC:H); private key recovery yields C:H with no integrity or availability impact.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
2DescriptionCVE.org
An issue was discovered in the mirage-crypto-ec package before 2.4.0 for OCaml. There is a timing side channel for NIST elliptic-curve scalar multiplication: the time required for a lookup can depend on a secret.
AnalysisAI
Timing side-channel in mirage-crypto-ec before 2.4.0 for OCaml enables remote cryptographic key recovery by exploiting secret-dependent timing variations during NIST elliptic-curve scalar multiplication table lookups. Affected applications performing ECDH key agreement or ECDSA signing - including TLS endpoints built on this library - leak private key material through measurable latency differences. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The target must run mirage-crypto-ec before 2.4.0 and expose NIST elliptic-curve scalar multiplication operations (ECDH key agreement or ECDSA signing) to an attacker who can trigger and precisely time a large number of operations - typically hundreds to thousands. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 5.9 (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N) accurately balances the severe potential impact (private key recovery) against the high attack complexity inherent to timing attacks. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade mirage-crypto-ec to version 2.4.0 or later, which resolves the timing side channel by implementing constant-time scalar multiplication table lookups. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-208 – Observable Timing Discrepancy
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External POC / Exploit Code
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