CVE-2026-88952— AshAuthentication OAuth2 账户链接逻辑缺陷
一分钟漏洞结论
影响对象
team-alembic ash_authentication
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。
team-alembic 项目中的 AshAuthentication 存在身份认证不当的漏洞，允许攻击者通过将一个 OAuth2 身份关联到一个不属于该攻击者的账户，从而以其他用户的身份登录。 具体机制如下： 使用注册动作的 键来匹配现有账户，随后通过 来控制是否将传入的提供商身份与该账户关联。 仅读取提供商返回的 布尔值，从未比较提供商的邮箱值与所匹配账户的邮箱。 该检查默认账户是通过其邮箱字段匹配到的，因此在其他 条件下，此检查形同虚设。攻击者只需提供一个经过验证的邮箱，即可将其身份附加到通过其他属性匹配到的
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一、 漏洞 CVE-2026-88952 基础信息
漏洞信息
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Vulnerability Title
OAuth2 sign-in attached to an existing account without an email comparison in AshAuthentication
来源: CVE Program / CVE List V5
Vulnerability Description
Improper Authentication vulnerability in team-alembic AshAuthentication allows an attacker to be signed in as another user by linking an OAuth2 identity to an account that is not theirs.
AshAuthentication.Strategy.OAuth2.UserResolver.resolve/3 matches an existing account using the register action's upsert_identity keys, then gates linking the incoming provider identity to it on email_trusted?/2, which reads only the provider's email_verified boolean and never compares the provider's email value with the matched account's email. That gate assumes the account was matched by its email field, so under any other upsert_identity it is vacuous and an attacker presenting their own verified email is attached to, and issued a session for, an account matched on some other attribute. The same unguarded gate applies in OAuth2.SignInPreparation on the registration_enabled? false path, where the account is matched by the sign-in action's read filter instead. The upsert also rewrites the matched account's email to the attacker's address, so later account recovery reaches the attacker rather than the owner.
This issue affects ash_authentication: from 4.14.0 before 4.15.0 and from 5.0.0-rc.10 before 5.0.0-rc.14.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
来源: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| team-alembic | ash_authentication | 4.14.0 ~ 4.15.0 |
cpe:2.3:a:team-alembic:ash_authentication:*:*:*:*:*:*:*:*
|
|
| team-alembic | ash_authentication | 64530644f9b37ebb76ca14aeb83a77597a0034b7 ~ * |
cpe:2.3:a:team-alembic:ash_authentication:*:*:*:*:*:*:*:*
|
|
二、漏洞 CVE-2026-88952 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-88952 厂商安全公告 (2)
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🔗 EEF-CVE-2026-88952 - OSV related
CVE-2026-88952 其他参考 (1)
同批安全公告 · team-alembic · 2026-09-17 · 共 14 条
| CVE-2026-82761 | 9.1 CRITICAL | AshAuthentication 令牌重放竞态漏洞 |
| CVE-2026-86533 | 9.1 CRITICAL | AshAuthentication Phoenix已吊销会话接收漏洞 |
| CVE-2026-85500 | 9.1 CRITICAL | Ash Authentication require_confirmed_with未强制校验漏洞 |
| CVE-2026-91039 | 9.1 CRITICAL | ash_authentication 动态 OIDC 跨连接账户接管漏洞 |
| CVE-2026-82760 | 8.2 HIGH | AshAuthentication API 密钥登录资源耗尽漏洞 |
| CVE-2026-82685 | 7.6 HIGH | AshAuthentication 确认令牌通用漏洞 |
| CVE-2026-80218 | 7.6 HIGH | AshAuthentication 登录令牌跨资源复用漏洞 |
| CVE-2026-81632 | 7.2 HIGH | AshAuthenticationPhoenix 一次性令牌重定向泄露漏洞 |
| CVE-2026-78223 | 6.9 MEDIUM | AshAuthentication 凭据撤销记录 JWT 验证漏洞 |
| CVE-2026-86522 | 6.3 MEDIUM | AshAuthentication 日志注入漏洞 |
| CVE-2026-81637 | 2.3 LOW | AshAuthentication 2.0.0 重放式CSRF漏洞 |
| CVE-2026-82723 | 1.8 LOW | AshAuthentication 审计日志记录密码摘要 |
| CVE-2026-82759 | 1.8 LOW | AshAuthentication审计日志哈希模式IP脱敏可逆漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-88952
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