Information Exposure Affecting cacti package, versions <1.2.31-0


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.36% (29th percentile)

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  • Snyk IDSNYK-ALPINE324-CACTI-17373376
  • published18 Jun 2026
  • disclosed10 Apr 2026

Introduced: 10 Apr 2026

CVE-2026-40194  (opens in a new tab)
CWE-208  (opens in a new tab)

How to fix?

Upgrade Alpine:3.24 cacti to version 1.2.31-0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream cacti package and not the cacti package as distributed by Alpine. See How to fix? for Alpine:3.24 relevant fixed versions and status.

phpseclib is a PHP secure communications library. Starting in 0.1.1 and prior to 3.0.51, 2.0.53, and 1.0.28, phpseclib\Net\SSH2::get_binary_packet() uses PHP's != operator to compare a received SSH packet HMAC against the locally computed HMAC. != on equal-length binary strings in PHP uses memcmp(), which short-circuits on the first differing byte. This is a real variable-time comparison (CWE-208), proven by scaling benchmarks. This vulnerability is fixed in 3.0.51, 2.0.53, and 1.0.28.