DTLS server cookie bypass during startup window due to empty initial cookie secret

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UBUNTU-CVE-2026-54887

Use of Default Cryptographic Key vulnerability in Erlang/OTP ssl DTLS server allows predictable DTLS cookie computation during the startup window, enabling source address verification bypass. On DTLS server startup, dtlsserverconnection:initialhello/3 initializes previouscookiesecret to the empty...

CVE-2026-54887

Use of Default Cryptographic Key vulnerability in Erlang/OTP ssl DTLS server allows predictable DTLS cookie computation during the startup window, enabling source address verification bypass. On DTLS server startup, dtlsserverconnection:initialhello/3 initializes previouscookiesecret to the empty...

CVE-2026-54887 DTLS server cookie bypass during startup window due to empty initial cookie secret

Use of Default Cryptographic Key vulnerability in Erlang/OTP ssl DTLS server allows predictable DTLS cookie computation during the startup window, enabling source address verification bypass. On DTLS server startup, dtlsserverconnection:initialhello/3 initializes previouscookiesecret to the empty...

EUVD-2026-41411

Use of Default Cryptographic Key vulnerability in Erlang/OTP ssl DTLS server allows predictable DTLS cookie computation during the startup window, enabling source address verification bypass. On DTLS server startup, dtlsserverconnection:initialhello/3 initializes previouscookiesecret to the empty...

CVE-2026-54887

Use of Default Cryptographic Key vulnerability in Erlang/OTP ssl DTLS server allows predictable DTLS cookie computation during the startup window, enabling source address verification bypass. On DTLS server startup, dtlsserverconnection:initialhello/3 initializes previouscookiesecret to the empty...

PT-2026-55269

Name of the Vulnerable Software and Affected Versions Erlang/OTP versions 20.0 through 29.0.2 Erlang/OTP versions 28.0 through 28.5.0.2 Erlang/OTP versions 27.0 through 27.3.4.13 ssl versions 8.2 through 11.7.2 ssl versions 11.6.0 through 11.6.0.2 ssl versions 11.2.0 through 11.2.12.9 Description...

SUSE CVE-2026-40934

Jupyter Server is the backend for Jupyter web applications. In versions 2.17.0 and earlier, the secret used to sign authentication cookies is persisted to a static file at /.local/share/jupyter/runtime/jupytercookiesecret and is never rotated when a user changes their password. After a password...

CVE-2026-40934 jupyter-server authentication cookies remain valid after password reset due to static cookie secret

Jupyter Server is the backend for Jupyter web applications. In versions 2.17.0 and earlier, the secret used to sign authentication cookies is persisted to a static file at /.local/share/jupyter/runtime/jupytercookiesecret and is never rotated when a user changes their password. After a password...

CVE-2026-40934

Jupyter Server is the backend for Jupyter web applications. In versions 2.17.0 and earlier, the secret used to sign authentication cookies is persisted to a static file at /.local/share/jupyter/runtime/jupytercookiesecret and is never rotated when a user changes their password. After a password...

CVE-2026-40934 jupyter-server authentication cookies remain valid after password reset due to static cookie secret

Jupyter Server is the backend for Jupyter web applications. In versions 2.17.0 and earlier, the secret used to sign authentication cookies is persisted to a static file at /.local/share/jupyter/runtime/jupytercookiesecret and is never rotated when a user changes their password. After a password...

CVE-2026-40934

CVE-2026-40934 affects Jupyter Server up to version 2.17.0, where the signing secret for authentication cookies is stored at ~/.local/share/jupyter/runtime/jupyter_cookie_secret and is never rotated on password changes. After a password reset and server restart, previously issued cookies remain c...

CVE-2026-40934

Jupyter Server is the backend for Jupyter web applications. In versions 2.17.0 and earlier, the secret used to sign authentication cookies is persisted to a static file at /.local/share/jupyter/runtime/jupytercookiesecret and is never rotated when a user changes their password. After a password...

Insufficient Session Expiration

Overview Affected versions of this package are vulnerable to Insufficient Session Expiration due to jupytercookiesecret never being automatically rotated or cleared. An attacker can keep or reuse authenticated session cookies after a password change by presenting a cookie signed with a secret tha...

Jupyter Server's Authentication Cookies Remain Valid After Password Reset and Server Restart

Summary A persistent cookie secret vulnerability allows authenticated users to maintain indefinite access even after password changes. The cookie secret used to sign authentication cookies is stored in a permanent file /.local/share/jupyter/runtime/jupytercookiesecret that is never automatically...

GHSA-5MRQ-X3X5-8V8F Jupyter Server's Authentication Cookies Remain Valid After Password Reset and Server Restart

Summary A persistent cookie secret vulnerability allows authenticated users to maintain indefinite access even after password changes. The cookie secret used to sign authentication cookies is stored in a permanent file /.local/share/jupyter/runtime/jupytercookiesecret that is never automatically...

PT-2026-37241

Name of the Vulnerable Software and Affected Versions Jupyter Server versions prior to 2.18.0 Description The secret used to sign authentication cookies is persisted to a static file at /.local/share/jupyter/runtime/jupyter cookie secret and is not rotated when a user changes their password...

EUVD-2026-23272

A privilege escalation vulnerability in Microchip IStaX allows an authenticated low-privileged user to recover a shared per-device cookie secret from their own webstaxauth session cookie and forge a new cookie with administrative privileges.This issue affects IStaX before 2026.03...

CVE-2026-2336

A privilege escalation vulnerability in Microchip IStaX allows an authenticated low-privileged user to recover a shared per-device cookie secret from their own webstaxauth session cookie and forge a new cookie with administrative privileges.This issue affects IStaX before 2026.03...

CVE-2026-2336 Weak webstax_auth Cookie Authentication Allows Privilege Escalation

A privilege escalation vulnerability in Microchip IStaX allows an authenticated low-privileged user to recover a shared per-device cookie secret from their own webstaxauth session cookie and forge a new cookie with administrative privileges.This issue affects IStaX before 2026.03...