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CVE-2026-116238— pgAdmin 4: The failed login limit can be bypassed, and Flask-Security's own views skip pgAdmin's login and password checks

Quick assessment

Affected
pgadmin.org pgAdmin 4
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.

在服务器模式下，pgAdmin 4 会在连续 MAX_LOGIN_ATTEMPTS 次登录失败（默认为 3 次）后锁定内部账户。然而，该限制可被绕过，导致未认证的攻击者在默认配置下能够对任意内部账户（包括管理员账户）进行无限次密码猜测。具体表现如下： Flask-Security 在 pgAdmin 旁边注册了自有视图。向 Flask-Security 的 视图提交的登录请求，未经 pgAdmin 的失败登录计数或锁定机制检查即被记录并处理；其 视图可无限制地验证已登录用户的密码；其 视图可在未经 pgAdmin

CVSS 8.1 · High
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I. Basic Information for CVE-2026-116238

Vulnerability Information
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Vulnerability Title
pgAdmin 4: The failed login limit can be bypassed, and Flask-Security's own views skip pgAdmin's login and password checks
Source: CVE Program / CVE List V5
Vulnerability Description
In server mode pgAdmin 4 locks an internal account after MAX_LOGIN_ATTEMPTS failed logins (3 by default). The limit could be bypassed, giving an unauthenticated attacker an unlimited number of password guesses against any internal account, including the administrator's, in the default configuration: - Flask-Security registers its own views next to pgAdmin's. A login submitted to its /login view was checked and logged in without pgAdmin's failed login count or lock. Its /verify view checked a signed-in user's password without limit, its /change view changed a password without pgAdmin's change password permission or re-encrypting the user's saved server passwords, and its /reset views sent and applied password resets for accounts that are not internal or are locked. - The internal account was looked up by its exact username, while the login form matches the email ignoring case, so a login with the username typed in another case was neither counted nor checked for the lock. - With LDAP or webserver authentication also configured, a wrong internal password was never counted, and with Kerberos or webserver authentication configured a guess could be answered without being counted. In addition, where accounts from different authentication sources share an email address, a password reset could be sent for, or applied to, an account from another source, and the About box showed the server configuration to a user whose email was that of an administrator's account. The fix refuses submissions to Flask-Security's own views, counts every failed internal login however the username is typed and whatever other sources are configured, no longer lets a login that posts a password fall back to an authentication source that does not check it, and locks only internal authentication. Password resets and the About box act only on the user's own internal account. Desktop mode is not affected. This issue affects pgAdmin 4: before 9.19.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
过多认证尝试的限制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
pgadmin.org pgAdmin 4 0 ~ 9.19 -

II. Public POCs for CVE-2026-116238

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III. Intelligence Information for CVE-2026-116238

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Other References for CVE-2026-116238 (4)

Same Patch Batch · pgadmin.org · 2026-10-30 · 15 CVEs total

CVE-2026-116241 9.9 CRITICAL pgAdmin 4: Import/Export Data query export runs a command through a backslash in a double-
CVE-2026-116239 8.5 HIGH pgAdmin 4: An LDAP or Kerberos login is logged in to another account with the same usernam
CVE-2026-116249 8.4 HIGH pgAdmin 4: Connection file paths and parameter keys escape the user's storage directory
CVE-2026-116247 8.2 HIGH pgAdmin 4: libpq uses the pgAdmin service account's own password file and client certifica
CVE-2026-116245 8.2 HIGH pgAdmin 4: Connection services are not restricted in server mode
CVE-2026-116242 8.2 HIGH pgAdmin 4: SSH tunnels use the pgAdmin service account's own SSH identity
CVE-2026-116244 8.2 HIGH pgAdmin 4: libpq uses the pgAdmin service account's Kerberos credentials
CVE-2026-116243 7.5 HIGH pgAdmin 4: Utility binary path can point at a shared storage directory
CVE-2026-116248 6.8 MEDIUM pgAdmin 4: Non-administrators can share a server with every user
CVE-2026-116252 6.5 MEDIUM pgAdmin 4: Materialized view refresh redirects its connection through a crafted database n
CVE-2026-116250 6.5 MEDIUM pgAdmin 4: Files opened in a storage directory follow a symbolic link, hard link or FIFO p
CVE-2026-116246 6.5 MEDIUM pgAdmin 4: Server passwords are left in pgAdmin's process environment
CVE-2026-116240 6.5 MEDIUM pgAdmin 4: File Manager and storage-path tools act on a different path from the one checke
CVE-2026-116251 4.2 MEDIUM pgAdmin 4: A user's other sessions survive a change of their password

IV. Related Vulnerabilities

Same product: pgAdmin 4
Same vendor: pgadmin.org
Same weakness: CWE-307