CVE-2026-88920— Apache WSS4J: SAML Sender-Vouches Authentication Bypass
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.
Apache WSS4J 中 DOM 安全处理器存在身份验证绕过漏洞，允许未经身份验证的远程攻击者通过构造包含攻击者可控密钥的未签名 SAML sender-vouches 断言，伪造已认证的 SOAP 消息。 建议用户升级至 4.0.2、3.0.6 或 2.4.4 版本，这些版本已修复该问题。
Possible ATT&CK Techniques 1 AI
T1558 · Steal or Forge Kerberos Tickets
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2026-88920
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Apache WSS4J: SAML Sender-Vouches Authentication Bypass
Source: CVE Program / CVE List V5
Vulnerability Description
An authentication bypass in the DOM security processor in Apache WSS4J allows unauthenticated remote attackers to forge authenticated SOAP messages via a crafted unsigned SAML sender-vouches assertion containing an attacker-controlled key.
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-2026-88920
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-88920
请登录查看更多情报信息。
Other References for CVE-2026-88920 (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-2026-87830 | Apache WSS4J: Streaming WS-SecurityPolicy validation may skip element-protection checks. | |
| 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-2026-87830
Apache WSS4J: Streaming WS-SecurityPolicy validation may ski
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-2026-87830
Apache WSS4J: Streaming WS-SecurityPolicy validation may ski
V. Comments for CVE-2026-88920
No comments yet