Allocation of Resources Without Limits or Throttling The advisory has been revoked - it doesn't affect any version of package org.springframework:spring-core (opens in a new tab)
Threat Intelligence
This vulnerability is trending on Twitter; this may indicate a growing threat.
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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- published9 Jun 2026
- disclosed8 Jun 2026
- creditUnknown
Introduced: 8 Jun 2026
CVE-2026-41851 (opens in a new tab)How to fix?
Upgrade org.springframework:spring-core to version 6.0.0, 6.2.19, 7.0.8 or higher.
Amendment
This was deemed not a vulnerability.
Overview
org.springframework:spring-core is a core package within the spring-framework that contains multiple classes and utilities.
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via caching of parsed Spring Expression Language (SpEL) expressions. An attacker can cause denial of service by supplying crafted user-controlled SpEL expressions that trigger unbounded growth of the expression cache. Over time, repeated evaluations can consume excessive memory, eventually leading to memory exhaustion and application unavailability.
Note: Exploitation typically requires a large number of expression evaluations, potentially millions of requests, even when reusing a single expression with dynamic inputs.