CVE-2026-87830— Apache WSS4J: Streaming WS-SecurityPolicy validation may skip element-protection checks.
Quick assessment
Affected
Apache Software Foundation Apache WSS4J
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.
在 StAX 流式 WS-SecurityPolicy 验证器中，某些相对路径或不受支持的 XPath 表达式可能被转换为永远不会匹配实际 XML 元素路径的路径。因此，远程 SOAP 对等方可能发送一个必需的 XML 元素，但该元素未包含预期的签名或加密保护。 建议用户升级到版本 4.0.2、3.0.6 或 2.4.4，这些版本已修复此问题。
Possible ATT&CK Techniques 1 AI
T1562.001
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I. Basic Information for CVE-2026-87830
Vulnerability Information
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Vulnerability Title
Apache WSS4J: Streaming WS-SecurityPolicy validation may skip element-protection checks.
Source: CVE Program / CVE List V5
Vulnerability Description
In the StAX streaming WS-SecurityPolicy validator, certain relative or unsupported XPath expressions can be converted into paths that never match the actual XML element path. A remote SOAP peer may therefore send a required element without the expected signature or encryption.
Users are recommended to upgrade to versions 4.0.2 or 3.0.6 or 2.4.4, which fix this issue.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Apache Software Foundation | Apache WSS4J | 4.0.0 ~ 4.0.2 | - |
|
II. Public POCs for CVE-2026-87830
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-87830 (1)
Same Patch Batch · Apache Software Foundation · 2026-09-30 · 19 CVEs total
| CVE-2026-102508 | 9.2 CRITICAL | Apache PLC4X: OPC UA secure channel: integrity bypass, unverifiable server certificate, an |
| CVE-2026-94052 | 9.1 CRITICAL | Apache MINA SSHD: LDAP password authentication ineffective |
| CVE-2026-77185 | 9.1 CRITICAL | Apache MINA SSHD: Asynchronous authentication can bypass signature verification |
| CVE-2026-94053 | 9.1 CRITICAL | Apache MINA SSHD: LDAP injection in sshd-ldap |
| CVE-2026-102509 | 8.7 HIGH | Apache PLC4X, Apache PLC4X: Pre-authentication resource exhaustion in the OPC UA driver an |
| CVE-2026-102510 | 8.7 HIGH | Apache PLC4X: Go binding: unbounded allocation and framing failures on wire-controlled len |
| CVE-2026-102511 | 8.5 HIGH | Apache PLC4X, Apache PLC4X, Apache PLC4X, Apache PLC4X: ADS discovery accepts spoofed resp |
| CVE-2026-93994 | 8.1 HIGH | Apache MINA SSHD: Repeated-publickey policy bypass on server |
| CVE-2026-94002 | 7.5 HIGH | Apache MINA SSHD: Memory exhaustion in SFTP client via unsolicited SFTP replies |
| CVE-2026-93995 | 6.5 MEDIUM | Apache MINA SSHD: Remote execution of JGit "archive -o=file.zip" can write file on the ser |
| CVE-2026-94029 | 6.5 MEDIUM | Apache MINA SSHD: Memory exhaustion in SFTP v6 check-file-name/check-file-handle extension |
| CVE-2026-93996 | 6.5 MEDIUM | Apache MINA SSHD: Memory exhaustion DoS via unbounded SCP command line read |
| CVE-2026-95616 | Apache WSS4J: Unauthenticated denial of service via integer overflow in DER parsing of X.5 | |
| CVE-2026-85532 | Apache WSS4J: Insufficient Validation of Derived-Key Parameters | |
| CVE-2026-88920 | Apache WSS4J: SAML Sender-Vouches Authentication Bypass | |
| CVE-2026-89238 | Apache WSS4J: WSS4J EncryptedHeader child confusion causing wrong protected-header selecti | |
| CVE-2026-92121 | Apache WSS4J: WS-SecurityPolicy signature checks skipped in the streaming code after an ST | |
| CVE-2026-92899 | Apache WSS4J: UsernameToken replay protection bypassed by re-encoding the Nonce |
IV. Related Vulnerabilities
Same product: Apache WSS4J
-
CVE-2026-95616
Apache WSS4J: Unauthenticated denial of service via integer -
CVE-2026-92899
Apache WSS4J: UsernameToken replay protection bypassed by re -
CVE-2026-92121
Apache WSS4J: WS-SecurityPolicy signature checks skipped in -
CVE-2026-89238
Apache WSS4J: WSS4J EncryptedHeader child confusion causing -
CVE-2026-88920
Apache WSS4J: SAML Sender-Vouches Authentication Bypass
Same vendor: Apache Software Foundation
-
CVE-2026-95616
Apache WSS4J: Unauthenticated denial of service via integer -
CVE-2026-92899
Apache WSS4J: UsernameToken replay protection bypassed by re -
CVE-2026-92121
Apache WSS4J: WS-SecurityPolicy signature checks skipped in -
CVE-2026-89238
Apache WSS4J: WSS4J EncryptedHeader child confusion causing -
CVE-2026-88920
Apache WSS4J: SAML Sender-Vouches Authentication Bypass
V. Comments for CVE-2026-87830
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