CVE-2026-40263: Observable Timing Discrepancy

Note Mark is an open-source note-taking application. In versions 0.19.1 and prior, the login endpoint performs bcrypt password verification only when the supplied username exists, returning immediately for nonexistent usernames. This timing discrepancy allows unauthenticated attackers to enumerat...

GRUB Cryptographic memcmp Buffer Overflow DoS

The vulnerability of the grubcryptomemcmp function in the GNU GRUB formerly Grub2 operating system is related to the disclosure of information due to timing discrepancies. Exploiting this vulnerability could allow an attacker to compromise the confidentiality of the protected information...

SUSE SLES15 Security Update : ovmf (SUSE-SU-2026:1413-1)

The remote SUSE Linux SLES15 / SLESSAP15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2026:1413-1 advisory. This update for ovmf fixes the following issue: - CVE-2025-59438: mbedtls: padding oracle attack possible through timing of cipher error...

CVE-2026-40263

Note Mark: Timing-based username enumeration vulnerability in login endpoint. Versions

CVE-2026-40263 Note Mark: Username Enumeration via Login Endpoint Timing Side-Channel

Note Mark is an open-source note-taking application. In versions 0.19.1 and prior, the login endpoint performs bcrypt password verification only when the supplied username exists, returning immediately for nonexistent usernames. This timing discrepancy allows unauthenticated attackers to enumerat...

CVE-2026-40263 Note Mark: Username Enumeration via Login Endpoint Timing Side-Channel

Note Mark is an open-source note-taking application. In versions 0.19.1 and prior, the login endpoint performs bcrypt password verification only when the supplied username exists, returning immediately for nonexistent usernames. This timing discrepancy allows unauthenticated attackers to enumerat...

CVE-2026-40263

Note Mark is an open-source note-taking application. In versions 0.19.1 and prior, the login endpoint performs bcrypt password verification only when the supplied username exists, returning immediately for nonexistent usernames. This timing discrepancy allows unauthenticated attackers to enumerat...

CVE-2026-40263 Note Mark: Username Enumeration via Login Endpoint Timing Side-Channel

Note Mark is an open-source note-taking application. In versions 0.19.1 and prior, the login endpoint performs bcrypt password verification only when the supplied username exists, returning immediately for nonexistent usernames. This timing discrepancy allows unauthenticated attackers to enumerat...

BIT-AUTHENTIK-2024-52307 authentik allows a timing attack due to missing constant time comparison for metrics view

authentik is an open-source identity provider. Due to the usage of a non-constant time comparison for the /-/metrics/ endpoint it was possible to brute-force the SECRETKEY, which is used to authenticate the endpoint. The /-/metrics/ endpoint returns Prometheus metrics and is not intended to be...

GHSA-WQQ3-WFMP-V85G Mojic: Observable Timing Discrepancy in HMAC Verification

Summary The CipherEngine in Mojic v2.1.3 uses a standard equality operator !== to verify the HMAC-SHA256 integrity seal during the decryption phase. This creates an Observable Timing Discrepancy CWE-208, allowing a potential attacker to bypass the file integrity check via a timing attack. Details...

Mojic: Observable Timing Discrepancy in HMAC Verification

Summary The CipherEngine in Mojic v2.1.3 uses a standard equality operator !== to verify the HMAC-SHA256 integrity seal during the decryption phase. This creates an Observable Timing Discrepancy CWE-208, allowing a potential attacker to bypass the file integrity check via a timing attack. Details...

Timing Attack

Overview mojic is an Obfuscate C source code into encrypted, password-seeded emoji streams. Affected versions of this package are vulnerable to Timing Attack in the getDecryptStream process. An attacker can bypass file integrity checks by exploiting timing discrepancies in the HMAC verification,...

ApostropheCMS: User Enumeration via Timing Side Channel in Password Reset Endpoint

Summary The password reset endpoint /api/v1/@apostrophecms/login/reset-request exhibits a measurable timing side channel that allows unauthenticated attackers to enumerate valid usernames and email addresses. When a user is not found, the handler returns after a fixed 2-second artificial delay, b...

GHSA-MJ7R-X3H3-7RMR ApostropheCMS: User Enumeration via Timing Side Channel in Password Reset Endpoint

Summary The password reset endpoint /api/v1/@apostrophecms/login/reset-request exhibits a measurable timing side channel that allows unauthenticated attackers to enumerate valid usernames and email addresses. When a user is not found, the handler returns after a fixed 2-second artificial delay, b...

EUVD-2026-23015

ApostropheCMS: User Enumeration via Timing Side Channel in Password Reset Endpoint...

Security update for ovmf

This update for ovmf fixes the following issue: CVE-2025-59438: mbedtls: padding oracle attack possible through timing of cipher error reporting bsc1252441. Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST onlineupdate or "zypper patch"...

SUSE-SU-2026:1413-1 Security update for ovmf

This update for ovmf fixes the following issue: - CVE-2025-59438: mbedtls: padding oracle attack possible through timing of cipher error reporting bsc1252441...

SUSE-SU-2026:21208-1 Security update for dovecot24

This update for dovecot24 fixes the following issues: - Update to v2.4.3 - CVE-2025-59028: Invalid base64 authentication can cause DoS for other logins bsc1260894. - CVE-2025-59031: decode2text.sh OOXML extraction may follow symlinks and read unintended files during indexing bsc1260895. -...

OPENSUSE-SU-2026:20554-1 Security update for dovecot24

This update for dovecot24 fixes the following issues: - Update to v2.4.3 - CVE-2025-59028: Invalid base64 authentication can cause DoS for other logins bsc1260894. - CVE-2025-59031: decode2text.sh OOXML extraction may follow symlinks and read unintended files during indexing bsc1260895. -...

CVE-2026-5086

Crypt::SecretBuffer versions before 0.019 for Perl is suseceptible to timing attacks. For example, if Crypt::SecretBuffer was used to store and compare plaintext passwords, then discrepencies in timing could be used to guess the secret password...