Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) Affecting openmage/magento-lts package, versions <20.18.0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published6 May 2026
- disclosed5 May 2026
- credit0x0OZ
Introduced: 5 May 2026
CVE-2026-42155 (opens in a new tab)How to fix?
Upgrade openmage/magento-lts to version 20.18.0 or higher.
Overview
openmage/magento-lts is a This repository is the home of an unofficial community-driven project.
Affected versions of this package are vulnerable to Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) in the start function. An attacker can gain unauthorized access to active API sessions by predicting session identifiers through brute-force attacks leveraging the predictability of time-based and process-derived inputs. This enables the attacker to perform actions with the privileges of authenticated API users, such as reading or modifying customer data, orders, and inventory, by submitting crafted session IDs to exposed API endpoints. This is only exploitable if the API endpoints lack rate limiting, allowing high-speed online brute-force attempts.