PYSEC-2026-1066
See a problem?- Import Source
- https://github.com/pypa/advisory-database/blob/main/vulns/wolfcrypt/PYSEC-2026-1066.yaml
- JSON Data
- https://api.osv.dev/v1/vulns/PYSEC-2026-1066
- Aliases
- Published
- 2026-07-06T08:03:28.431283Z
- Modified
- 2026-07-07T11:45:36.876574658Z
- Severity
-
- 4.7 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
- Summary
- wolfCrypt leaks cryptographic information via timing side channel
- Details
-
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. - References
-
- https://nvd.nist.gov/vuln/detail/CVE-2019-13628
- https://eprint.iacr.org/2011/232.pdf
- https://github.com/wolfSSL/wolfcrypt-py
- https://minerva.crocs.fi.muni.cz
- https://tches.iacr.org/index.php/TCHES/article/view/7337
- http://www.openwall.com/lists/oss-security/2019/10/02/2
- https://pypi.org/project/wolfcrypt
- https://github.com/advisories/GHSA-q95h-vc86-hv77
Affected packages
PyPI / wolfcrypt
Package
- Name
- wolfcrypt
- View open source insights on deps.dev
- Purl
- pkg:pypi/wolfcrypt
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed4.1.0