CVE-2026-88823— AES-GCM-SIV 零长度增量 AAD 更新后 AAD 伪造漏洞
一分钟漏洞结论
影响对象
OpenSSL OpenSSL
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
问题摘要： AES-GCM-SIV 实现将零长度的附加认证数据（AAD）更新视为对迄今所有已提供 AAD 的重置，而非保持 AAD 不变。因此，若应用程序分多个片段提供 AAD，且其中某一片段为空，则生成或验证的消息其认证标签将不包含空片段之前所提供的 AAD。 影响摘要： 应用程序原本意图与消息一同进行认证的数据会被静默地遗漏认证。攻击者可伪造此类消息的 AAD。 CWE： CWE-325：缺失加密步骤 详细描述： 若应用程序以多个片段传递 AAD，且其中某些片段长度为零，则此前提供的 AAD 片段将实质上未被认
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一、 漏洞 CVE-2026-88823 基础信息
漏洞信息
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Vulnerability Title
AES-GCM-SIV AAD Forgery After Zero-length Incremental AAD Update
来源: CVE Program / CVE List V5
Vulnerability Description
Issue summary: The AES-GCM-SIV implementation treats a zero-length Additional
Authenticated Data (AAD) update as a reset of all the AAD supplied so far,
instead of leaving the AAD unchanged. An application that supplies its AAD in
several fragments, one of which is empty, therefore produces or verifies
messages whose authentication tag does not cover the AAD supplied before
the empty fragment.
Impact summary: Data an application intended to authenticate alongside a
message is silently left unauthenticated. An attacker can forge the AAD of such
a message.
CWE: CWE-325: Missing Cryptographic Step
Description: An application passing AAD in multiple chunks of which some have
zero length will have the previous AAD chunks effectively unauthenticated. Also,
on context re-initialisation, the AAD was not reset, which meant that any AAD
accumulated from the previous context usage were also included in the AAD of the
new message.
The fix makes a zero-length AAD update a no-op and clears any accumulated AAD
whenever the context is re-initialised with a key or a nonce.
A re-initialisation that only changes parameters keeps the AAD.
FIPS impact: no
The FIPS modules are not affected, as AES-GCM-SIV is not a FIPS approved
algorithm and is implemented only in the default provider, outside the
OpenSSL FIPS module boundary.
来源: CVE Program / CVE List V5
CVSS Information
N/A
来源: CVE Program / CVE List V5
Vulnerability Type
缺少必要的密码学步骤
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-88823 的公开POC
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CVE-2026-88823 厂商安全公告 (1)
-
🔗 https://openssl-library.org/news/secadv/20261110.txt vendor-advisory
CVE-2026-88823 其他参考 (3)
同批安全公告 · OpenSSL · 2026-11-10 · 共 5 条
| CVE-2026-107496 | OpenSSL CMS_encrypt() 无限循环漏洞 | |
| CVE-2026-95691 | QUIC 重传 CRYPTO 帧导致拒绝服务或信息泄露 | |
| CVE-2026-95692 | AES-GCM-SIV 越界读取及 IV 处理漏洞 | |
| CVE-2026-88822 | QUIC 自动对等检测未初始化栈字节漏洞 |