Cyber Resilience

CVE-2026-44368

Published
13 May 2026
Modified
17 June 2026
CVSS Score v4 6.9
Click a component to see what it means
Raw vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score 0.0031 24th percentile
Risk Priority 35 floored blend · peak EPSS

Summary

CVE-2026-44368 is a medium-severity Observable Timing Discrepancy (CWE-208) vulnerability. Its CVSS base score is 6.9 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Private Keys (T1552.004); ranked at the 24th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SA-11 (Developer Testing and Evaluation) and SA-8 (Security and Privacy Engineering Principles) — see the control section below for these in your framework.

EU & UK References

Vulnerability Data

PyQuorum is a cryptographic library for secret sharing and key management. Prior to 0.2.1, the mul_mod function implements multiplication via a binary expansion loop whose execution time depends on the Hamming weight of the second operand (the exponent). An attacker…

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who can measure the time of secret‑sharing operations (e.g., via a remote service) could progressively recover the values of shares, ultimately leading to secret reconstruction. This vulnerability is fixed in 0.2.1.

CWE(s)
CWE-208

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1552.004 Private Keys Credential Access
Adversaries may search for private key certificate files on compromised systems for insecurely stored credentials.
attack.mitre.org →
T1600 Weaken Encryption Defense Impairment
Adversaries may compromise a network device’s encryption capability in order to bypass encryption that would otherwise protect data communications.
attack.mitre.org →
Why these techniques?

Timing side-channel in key-management library enables private-key recovery (T1552.004) and effectively weakens encryption (T1600).

Confidence: MEDIUM · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2026-41407Shared CWE-208
CVE-2025-52457Shared CWE-208
CVE-2026-27882Shared CWE-208
CVE-2026-6656Shared CWE-208
CVE-2025-59058Shared CWE-208
CVE-2026-33129Shared CWE-208
CVE-2026-40194Shared CWE-208
CVE-2026-9537Shared CWE-208
CVE-2025-22234Shared CWE-208
CVE-2026-28464Shared CWE-208

Affected Assets

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)
  • SA-11 Developer Testing and Evaluation
  • SA-8 Security and Privacy Engineering Principles
  • SA-15 Development Process, Standards, and Tools
Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V11.2.4

Mitigating Controls (NIST 800-53 r5) AI

SA-11 Developer Testing and Evaluation good match
prevent

Requires developer testing and evaluation that can specifically include side-channel analysis to detect timing variations such as the Hamming-weight-dependent mul_mod loop.

SA-8 Security and Privacy Engineering Principles good match
prevent

Mandates application of security engineering principles (e.g., constant-time algorithms) that directly eliminate observable timing discrepancies in cryptographic operations.

SA-15 Development Process, Standards, and Tools partial match
prevent

Requires use of secure development standards and tools that enforce constant-time implementations for secret-sharing primitives.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly require constant-time implementations that eliminate observable timing discrepancies.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.17 Clock synchronization none match
none

Consistent reference clocks limit the attacker's ability to measure or manipulate timing differences that could reveal internal state or processing paths.

References