What is CVE-2023-46234?

CVE-2023-46234 is a medium-severity vulnerability in Browserify Browserify-Sign, classified under Improper Verification of Cryptographic Signature. CVSS score: 6.5/10. Published 2023-10-26.

How severe is CVE-2023-46234?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2023-46234 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Browserify Browserify-Sign

CVE-2023-46234

browserify-sign is a package to duplicate the functionality of node's crypto public key functions, much of this is based on Fedor Indutny's work on indutny/tls.js. An upper bound check issue in `dsaVerify` function allows an attacker to construct signatures that can be successfully verified by any public key, thus leading to a signature forgery attack. All places in this project that involve DSA verification of user-input signatures will be affected by this vulnerability. This issue has been patched in version 4.2.2.

Published 2023-10-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.005 (41.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Browserify Browserify-Sign — versions >= 2.6.0, <= 4.2.1
Debian Linux — versions 11.0, 12.0

Weakness classification (CWE)

CWE-347 — Improper Verification of Cryptographic Signature

Public proof-of-concept exploits

References

github.com/browserify/browserify-sign/security/advisories/GHSA-x9w5-v3q2-3rhw (Third Party Advisory)
github.com/browserify/browserify-sign/commit/85994cd6348b50f2fd1b73c54e20881416… (Third Party Advisory)
lists.debian.org/debian-lts-announce/2023/10/msg00040.html (Third Party Advisory)
www.debian.org/security/2023/dsa-5539 (Third Party Advisory)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (Release Notes)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (Release Notes)

Frequently asked questions

What is CVE-2023-46234?: CVE-2023-46234 is a medium-severity vulnerability in Browserify Browserify-Sign, classified under Improper Verification of Cryptographic Signature. CVSS score: 6.5/10. Published 2023-10-26.
How severe is CVE-2023-46234?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2023-46234 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.