curve25519-dalek has timing variability in `curve25519-dalek`'s `Scalar29::sub`/`Scalar52::sub`

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

• CISA KEV Not listed.
• EPSS 0.0018, the 7th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

1. 31 Oct 2026, 15:17 UTC First seen by agentprime
2. 31 Oct 2026, 15:17 UTC Confirmed by OSV

Sources

• GitHub Advisory Database: GHSA-x4gp-pqpj-f43q
• OSV: GHSA-x4gp-pqpj-f43q
• nvd.nist.gov/vuln/detail/CVE-2024-58262
• github.com/dalek-cryptography/curve25519-dalek/pull/659
• github.com/dalek-cryptography/curve25519-dalek/commit/415892acf1cdf9161bd6a4c99bc2f4cb8fae5e6a
• github.com/dalek-cryptography/curve25519-dalek
• rustsec.org/advisories/RUSTSEC-2024-0344.html

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.