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TI-2019-10241 Aliases CVE-2019-13628GHSA-q95h-vc86-hv77

wolfSSL and wolfCrypt 4.0.0 and earlier (when configured without --enable-fpecc…

Priority LOW 22CWE-203Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
High
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-203.

Summary

wolfSSL and wolfCrypt 4.0.0 and earlier (when configured without --enable-fpecc, --enable-sp, or --enable-sp-math) contain a timing side channel in ECDSA signature generation. This allows a local attacker, able to precisely measure the duration of signature operations, to infer information about the nonces used and potentially mount a lattice attack to recover the private key used. The issue occurs because ecc.c scalar multiplication might leak the bit length.

Why it matters now

EPSS 0.0038 32nd percentileScored 2026-11-07
Fix Fixed wolfcrypt (PyPI): 4.1.0

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
—wolfcrypt (PyPI)before 4.1.04.1.0Patch availableGHSA-q95h-vc86-hv77
  • — Vendor— Affected all versions Fixed in — No fix listed CNA
  • wolfcrypt (PyPI) Vendor— Affected before 4.1.0 Fixed in 4.1.0 Patch available GHSA-q95h-vc86-hv77

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*up to 4.0.0VulnerablewolfSSL
  • cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:* Versions up to 4.0.0 Vulnerable ·wolfSSL

Remediation

  • Fix · GHSA-q95h-vc86-hv77 wolfcrypt (PyPI) Fixed in 4.1.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-13628
  2. 2026-10-03 Alias added: GHSA-q95h-vc86-hv77

References

Advisory 4

Other 3

  • TI-2024-00830 SEGV and out of bounds memory read from malicious packet CVSS 3.1CRITICAL 9.1
  • TI-2022-18557 In wolfSSL before 5.5.1, malicious clients can cause a buffer overflow during a TLS 1.3… CVSS 3.1HIGH 7.5
  • TI-2025-10943 Potential DoS Vulnerability through Multiple KeyShareEntry with Same Group in TLS 1.3 ClientHello CVSS 4.0MEDIUM 6.3
  • TI-2017-09737 wolfSSL Bleichenbacher/ROBOT CVSS 3.0HIGH 7.5
  • TI-2019-08902 wolfSSL 4.0.0 has a Buffer Overflow in DoPreSharedKeys in tls13.c when a current identity… CVSS 3.1CRITICAL 9.8
  • TI-2017-02021 Improper certificate validation in wolfSSL CVSS 3.1CRITICAL 9.8
See all 150 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences