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  4. CVE 2026 116486 objenesis before 36 type confusion via class name
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Back to active CVEs
Low · CVSS 2.0CVE-2026-116486

Objenesis before 3.6 Type Confusion via Class Name Instantiator CacheCVE-2026-116486

Answer in brief

CVE-2026-116486 records a Low severity (CVSS 2.0) vulnerability in Objenesis before 3.6 Type Confusion via Class Name Instantiator Cache. The current sources do not mark it as known exploited. The current feed maps easymock/objenesis (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 26, 2026Updated Oct 26, 2026Source checked Oct 26, 2026First seen by HOL Oct 26, 2026Material review Oct 26, 2026
Upstream Advisory

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-386
Source
CVE List V5
Source checked
Oct 26, 2026
References
5 linked sources
Open source record

Key facts

Risk
Low · CVSS 2.0
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 2.0. 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 easymock/objenesis (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
easymock/objenesisgeneric>=0 <3.63.6

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for easymock/objenesis.
  2. 2Review the reported fix. Update easymock/objenesis to 3.6 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 26, 2026

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

  2. Source modified

    Oct 26, 2026

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

  3. First seen by HOL

    Oct 26, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source description

Objenesis before 3.6 contains a type confusion vulnerability that allows code in one class loader to substitute objects into another by exploiting instantiator caching keyed on class name. When a shared ObjenesisStd instance caches instantiators by clazz.getName() in ObjenesisBase.getInstantiatorOf(), same-named classes collide, causing newInstance() to return wrong-class objects and ClassCastException failures.

Quoted source text, attributed separately from HOL analysis.