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  4. CVE 2026 103831 insecure deserialization in the truelayer magento
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Back to active CVEs
High · CVSS 7.5CVE-2026-103831

Insecure deserialization in the TrueLayer Magento 2 pluginCVE-2026-103831

Answer in brief

CVE-2026-103831 records a High severity (CVSS 7.5) vulnerability in Insecure deserialization in the TrueLayer Magento 2 plugin. The current sources do not mark it as known exploited. The current feed maps TrueLayer/TrueLayer Magento 2 Plugin (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 6, 2026Updated Oct 6, 2026Source checked Oct 6, 2026First seen by HOL Oct 6, 2026Material review Oct 6, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.5
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps TrueLayer/TrueLayer Magento 2 Plugin (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
TrueLayer/TrueLayer Magento 2 Plugingenericversions 2.4.0 through 2.4.2.Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for TrueLayer/TrueLayer Magento 2 Plugin.
  2. 2Review the reported fix. Source-reported solution: The vulnerability has been fixed by the TrueLayer team in version 2.4.3 of the TrueLayer Magento 2 Plugin, which has been publicly available since August 3, 2026. The fix removes the use of the unserialize() function in the Psr16CacheAdapter component and adopts a JSON-based serialization mechanism, in line with the security practices implemented in the Magento 2 core. It is recommended to update the plugin to version 2.4.3 or later. It is also recommended to ensure that the caching infrastructure used by Magento does not allow unauthorized write access.

Evidence timeline and material changes

  1. Published upstream

    Oct 6, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 6, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 6, 2026

Sources and claim methodology

  • Source referenceincibe.es
Upstream source description

CVE-2026-103831: Insecure deserialization vulnerability in the Psr16CacheAdapter component of the TrueLayer Magento 2 Plugin, due to the use of PHP's native unserialize() function without restrictions on the classes allowed when retrieving data stored in the cache. An attacker who already has the ability to write manipulated data to the cache backend used by Magento—such as Redis or Memcached—could inject specially crafted PHP objects and trigger their deserialization, potentially leading to arbitrary code execution via gadget strings available in the application environment. Exploitation therefore requires a prerequisite condition that allows writing to the cache infrastructure, either through access to the local file system or to a cache infrastructure accessible from the Magento environment.

Quoted source text, attributed separately from HOL analysis.

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Record context

Vulnerability class
Deserialization
EPSS
Not reported
CWE IDs
CWE-502
Source
CVE List V5
Source checked
Oct 6, 2026
References
1 linked source
Open source record