What is CVE-2025-46597?

CVE-2025-46597 is a high-severity vulnerability in Bitcoin Core, classified under Integer Overflow or Wraparound. CVSS score: 7.5/10. Published 2026-03-20.

How severe is CVE-2025-46597?

High severity. CVSS v3 base score is 7.5 out of 10.

Integer overflow in Bitcoin Core

CVE-2025-46597

Bitcoin Core 0.13.0 through 29.x has an integer overflow.

Vulnerability class: Integer Overflow

Published 2026-03-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.003 (18.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 18.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Bitcoin Core

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

github.com/bitcoin/bitcoin/releases (Release Notes)
bitcoincore.org/en/2025/10/24/disclose-cve-2025-46597/ (Vendor Advisory)

Frequently asked questions

What is CVE-2025-46597?: CVE-2025-46597 is a high-severity vulnerability in Bitcoin Core, classified under Integer Overflow or Wraparound. CVSS score: 7.5/10. Published 2026-03-20.
How severe is CVE-2025-46597?: High severity. CVSS v3 base score is 7.5 out of 10.