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CVE-2026-94114— Apache Commons BCEL: Nested Code/Record attributes drive unbounded parse-time recursion in ClassParser

Quick assessment

Affected
Apache Software Foundation Apache Commons BCEL
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache Commons 中存在符号名称无法正确映射到对应对象的漏洞。 BCEL（字节码工程库）会将由攻击者控制的类以其自我声明的名称进行缓存，而不会验证所请求的名称是否合法。这导致后续的名称查找以及基于名称的验证结果可能指向不同的类。 该漏洞影响 Apache Commons 的 6.13.0 之前版本。 建议用户升级至 6.13.0 版本，该版本已修复此问题。

CVSS 5.9 · Medium

Affected Version Matrix 2

VendorProduct Version RangeStatus
Apache Software Foundation Apache Commons BCEL < 6.13.0 affected
< 14890bf2b9014df25f9b4de86f29b5e917e5656b affected
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I. Basic Information for CVE-2026-94114

Vulnerability Information
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Vulnerability Title
Apache Commons BCEL: Nested Code/Record attributes drive unbounded parse-time recursion in ClassParser
Source: CVE Program / CVE List V5
Vulnerability Description
Symbolic name not mapping to correct object vulnerability in Apache Commons. BCEL caches attacker-controlled classes under their self-declared names without validating the requested name, allowing subsequent lookups and name-keyed verification results to refer to a different class. This issue affects Apache Commons: before 6.13.0. Users are recommended to upgrade to version 6.13.0, which fixes the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
符号名称未能映射到正确对象
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache Commons BCEL 0 ~ 6.13.0 -

II. Public POCs for CVE-2026-94114

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III. Intelligence Information for CVE-2026-94114

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Other References for CVE-2026-94114 (2)

Same Patch Batch · Apache Software Foundation · 2026-10-06 · 8 CVEs total

CVE-2026-105244 5.3 MEDIUM Apache log4net: RemoteSyslogAppender silently deletes non-ASCII content
CVE-2026-105243 5.3 MEDIUM Apache log4net: Oversize EventLogAppender record silently discarded
CVE-2026-105242 5.3 MEDIUM Apache log4net: Request validation failure drops the event in the aspnet-request converter
CVE-2026-105241 5.3 MEDIUM Apache log4net: Unencodable content discards a whole SmtpPickupDirAppender batch
CVE-2026-105240 5.3 MEDIUM Apache log4net: NUL character truncates OutputDebugStringAppender records
CVE-2026-105239 5.3 MEDIUM Apache log4net: NUL character truncates EventLogAppender records
CVE-2026-105111 4.7 MEDIUM Apache Commons BCEL: Class2HTML emits unescaped class strings, enabling stored XSS

IV. Related Vulnerabilities

Same product: Apache Commons BCEL
Same vendor: Apache Software Foundation

V. Comments for CVE-2026-94114

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