Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The ecdsa package (python-ecdsa), in all versions, is affected by a Minerva timing attack on the P-256 curve. An attacker who can time signing operations made through SigningKey.sign_digest() may be able to recover the internal nonce and possibly the private key; ECDSA key generation and ECDH are also affected, while signature verification is not. No fixed version is listed, and the project considers side-channel attacks out of scope and has no planned fix.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 7.4 | High | 3.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0098, the 62nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:35 UTC First seen by agentprime
- 31 Oct 2026, 14:35 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-wj6h-64fc-37mp
- OSV: GHSA-wj6h-64fc-37mp
- github.com/tlsfuzzer/python-ecdsa/security/advisories/GHSA-wj6h-64fc-37mp
- nvd.nist.gov/vuln/detail/CVE-2024-23342
- github.com/tlsfuzzer/python-ecdsa
- github.com/tlsfuzzer/python-ecdsa/blob/master/SECURITY.md
- minerva.crocs.fi.muni.cz
- securitypitfalls.wordpress.com/2018/08/03/constant-time-compare-in-python