Spring Data REST 3.7.0-5.0.5 JSON Patch SpEL Injection via Map Keys
CVE-2026-41729 Published on June 9, 2026
Spring Data REST SpEL Injection via Map Key in JSON Patch
Spring Data REST is vulnerable to SpEL expression injection through map-typed properties when processing JSON Patch (application/json-patch+json) requests. When a persistent entity exposes a Map-typed property, the JSON Pointer path segment used as the map key is embedded directly into a SpEL expression without sanitization or validation.
Affected versions:
Spring Data REST 3.7.0 through 3.7.19; 4.3.0 through 4.3.16; 4.4.0 through 4.4.14; 4.5.0 through 4.5.11; 5.0.0 through 5.0.5.
Vulnerability Analysis
CVE-2026-41729 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality and integrity, and no impact on availability.
Weakness Type
What is an EL Injection Vulnerability?
The software constructs all or part of an expression language (EL) statement in a Java Server Page (JSP) using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended EL statement before it is executed.
CVE-2026-41729 has been classified to as an EL Injection vulnerability or weakness.
Products Associated with CVE-2026-41729
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Affected Versions
Spring Data REST:- Version 3.7.0 and below 3.7.20 is affected.
- Version 4.3.0 and below 4.3.17 is affected.
- Version 4.4.0 and below 4.4.15 is affected.
- Version 4.5.0 and below 4.5.12 is affected.
- Version 5.0.0 and below 5.0.6 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.