CVE-2026-4258

All versions of the package sjcl are vulnerable to Improper Verification of Cryptographic Signature due to missing point-on-curve validation in sjcl.ecc.basicKey.publicKey. An attacker can recover a victim's ECDH private key by sending crafted off-curve public keys and observing ECDH outputs. The...

Using a VPN May Subject You to NSA Spying

US lawmakers are pressing Tulsi Gabbard to reveal whether using a VPN can strip Americans of their constitutional protections against warrantless surveillance...

EUVD-2026-16162

Mattermost versions 11.2.x = 11.2.2, 10.11.x = 10.11.10, 11.4.x = 11.4.0, 11.3.x = 11.3.1 fail to restrict team-level access when processing membership sync from a remote cluster, which allows a malicious remote cluster to grant a user access to an entire private team instead of only the shared...

GHSA-G7FP-CQJ5-X8HF Mattermost has an Incorrect Authorization issue

Mattermost versions 11.2.x = 11.2.2, 10.11.x = 10.11.10, 11.4.x = 11.4.0, 11.3.x = 11.3.1 fail to restrict team-level access when processing membership sync from a remote cluster, which allows a malicious remote cluster to grant a user access to an entire private team instead of only the shared...

EUVD-2026-16148

Vulnerability of incorrect authorization in HiJiffy Chatbot allows an attacker to download private messages from other users via the parameter 'ID' in '/api/v1/download//'...

EUVD-2026-16150

Vulnerability of incorrect authorization in HiJiffy Chatbot allows an attacker to download private messages from other users via the parameter 'visitor' in '/api/v1/webchat/message'...

Mattermost has an Incorrect Authorization issue

Mattermost versions 11.2.x = 11.2.2, 10.11.x = 10.11.10, 11.4.x = 11.4.0, 11.3.x = 11.3.1 fail to restrict team-level access when processing membership sync from a remote cluster, which allows a malicious remote cluster to grant a user access to an entire private team instead of only the shared...

Incorrect Authorization

Overview Affected versions of this package are vulnerable to Incorrect Authorization in the membership synchronization process. An attacker can gain unauthorized access to an entire private team by sending crafted membership synchronization messages from a remote cluster that trigger team...

CVE-2026-4274

Mattermost versions 11.2.x = 11.2.2, 10.11.x = 10.11.10, 11.4.x = 11.4.0, 11.3.x = 11.3.1 fail to restrict team-level access when processing membership sync from a remote cluster, which allows a malicious remote cluster to grant a user access to an entire private team instead of only the shared...

CVE-2026-4274 Insufficient authorization in shared channel membership sync grants team-level access instead of channel-level access

Mattermost versions 11.2.x = 11.2.2, 10.11.x = 10.11.10, 11.4.x = 11.4.0, 11.3.x = 11.3.1 fail to restrict team-level access when processing membership sync from a remote cluster, which allows a malicious remote cluster to grant a user access to an entire private team instead of only the shared...

CVE-2026-4274

Mattermost CVE-2026-4274 affects multiple release lines: 11.2.x <= 11.2.2, 10.11.x <= 10.11.10, 11.4.x <= 11.4.0, and 11.3.x

CVE-2026-4274 Insufficient authorization in shared channel membership sync grants team-level access instead of channel-level access

Mattermost versions 11.2.x = 11.2.2, 10.11.x = 10.11.10, 11.4.x = 11.4.0, 11.3.x = 11.3.1 fail to restrict team-level access when processing membership sync from a remote cluster, which allows a malicious remote cluster to grant a user access to an entire private team instead of only the shared...

CVE-2026-4274

Mattermost versions 11.2.x = 11.2.2, 10.11.x = 10.11.10, 11.4.x = 11.4.0, 11.3.x = 11.3.1 fail to restrict team-level access when processing membership sync from a remote cluster, which allows a malicious remote cluster to grant a user access to an entire private team instead of only the shared...

CVE-2026-4274 Insufficient authorization in shared channel membership sync grants team-level access instead of channel-level access

Mattermost versions 11.2.x = 11.2.2, 10.11.x = 10.11.10, 11.4.x = 11.4.0, 11.3.x = 11.3.1 fail to restrict team-level access when processing membership sync from a remote cluster, which allows a malicious remote cluster to grant a user access to an entire private team instead of only the shared...

CVE-2026-4263

Vulnerability of incorrect authorization in HiJiffy Chatbot allows an attacker to download private messages from other users via the parameter 'visitor' in '/api/v1/webchat/message'...

CVE-2026-4262

Vulnerability of incorrect authorization in HiJiffy Chatbot allows an attacker to download private messages from other users via the parameter 'ID' in '/api/v1/download//'...

CVE-2026-4263

Vulnerability of incorrect authorization in HiJiffy Chatbot allows an attacker to download private messages from other users via the parameter 'visitor' in '/api/v1/webchat/message'...

CVE-2026-4263 Incorrect authorization in HiJiffy Chatbot

Vulnerability of incorrect authorization in HiJiffy Chatbot allows an attacker to download private messages from other users via the parameter 'visitor' in '/api/v1/webchat/message'...

CVE-2026-4263 Incorrect authorization in HiJiffy Chatbot

Vulnerability of incorrect authorization in HiJiffy Chatbot allows an attacker to download private messages from other users via the parameter 'visitor' in '/api/v1/webchat/message'...

CVE-2026-4263

CVE-2026-4263 concerns an incorrect authorization flaw in the HiJiffy Chatbot. The vulnerability allows an attacker to download private messages from other users by abusing the parameter 'visitor' in the API endpoint /api/v1/webchat/message. The CVSS details indicate a network-based, low-complexi...