CVE-2026-59283

Safety guard bypass via silent SpEL compilation

Published Aug 27, 2026 · Updated Aug 27, 2026

Safety guard bypass in affected Spring Framework releases allows attackers to evade SpEL restrictions through compiled expressions. The SpEL compiler silently compiles expressions evaluated with SimpleEvaluationContext, so later evaluations skip interpreter-enforced guards. Reachability requires attacker-influenced expressions and IMMEDIATE or MIXED compilation; distinct expressions can also drive unbounded class loading.

CVSS severityUnavailable
Unscored
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Safety guard bypass in affected Spring Framework releases allows attackers to evade SpEL restrictions through compiled expressions. The SpEL compiler silently compiles expressions evaluated with SimpleEvaluationContext, so later evaluations skip interpreter-enforced guards. Reachability requires attacker-influenced expressions and IMMEDIATE or MIXED compilation; distinct expressions can also drive unbounded class loading.

The record

CVE
CVE-2026-59283
Published
Aug 27, 2026
Updated
Aug 27, 2026
Vendor
Spring
Product
Spring Framework
Classifications
CWE-770, CWE-913
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=5.2.25.RELEASE
  2. Affected versionversion=5.3.0 <=5.3.49
  3. Affected versionversion=6.0.0 <=6.0.30
  4. Affected versionversion=6.1.0 <=6.1.28
  5. Affected versionversion=6.2.0 <=6.2.19
  6. Affected versionversion=7.0.0 <=7.0.8

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

Spring · Spring Frameworkversion=0 <=5.2.25.RELEASE; version=5.3.0 <=5.3.49; version=6.0.0 <=6.0.30; version=6.1.0 <=6.1.28; version=6.2.0 <=6.2.19; version=7.0.0 <=7.0.8

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
CWE-913Improper Control of Dynamically-Managed Code Resources

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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