CVE-2026-74878CWE-770denial-of-service

CVE-2026-74878

Critical · published August 17, 2026

CVSS v3.1

9.8

EPSS

Percentile

54.4

In the wild

Unconfirmed

What it is

openssl_encrypt versions before 1.4.0 use an in-memory rate limiter for TOTP brute-force protection that is not shared across workers and is lost on server restart. Attackers can distribute authentication attempts across multiple server instances or retry immediately after a restart to bypass rate limiting protections.

The record

Technical detail

CVSS v3.1: 9.8 · CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0: 9.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS: 0.00749 · 54.4th percentile
Weakness: CWE-770 · Allocation of Resources Without Limits or Throttling
Published: 2026-08-17T15:16Z

Affected products (1)

Product	Versions	Fixed in
jahlives/openssl_encrypt	< 1.4.0	1.4.0

References (2)

https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-h45m-mgcp-q388 · [email protected]https://www.vulncheck.com/advisories/openssl-encrypt-before-totp-rate-limiter-bypass · [email protected]

EPSS history

Timeline

17 AUG 11:04Z
openssl_encrypt before 1.4.0 TOTP Rate Limiter Bypass
cvelistv5