CVE-2026-18560
Mattermost versions 11.10.x <= 11.10.0, 11.7.x <= 11.7.9, 11.9.x <= 11.9.1, 11.8.x <= 11.8.5 fail to validate user’s permissions before othe
CVSS
4.3
Medio
EPSS
0.2%
p7
KEV
—
Exploit Today
2
0-100
Publicado: 16 oct 2026 · Última mod.: 16 oct 2026 · CWE-203
0.2%EPSS · 30 días0.2%
2026-10-162026-10-19
Mattermost versions 11.10.x <= 11.10.0, 11.7.x <= 11.7.9, 11.9.x <= 11.9.1, 11.8.x <= 11.8.5 fail to validate user’s permissions before other validations which allows non-content reviewers to infer a post’s flagged status via direct API call.. Mattermost Advisory ID: MMSA-2026-00754
CVECVSSEPSSKEVRExplotTítuloVis.
CVE-2025-135915.3 MED—
——0The authentication endpoint of WSO2 Identity Server fails to provide a consistent system response when a username does not exist in the system, allowing attackers to differentiate between valid and invalid usernames. This difference in responses can be leveraged to enumerate existing user accounts.
Successful exploitation enables an attacker to discover valid usernames within the system, significantly increasing the risk of subsequent attacks such as brute force attacks on user credentials, social engineering attacks, and information leakage. The discovered usernames can be used to craft targeted phishing emails or other social engineering campaigns.21hCVE-2026-1119333.7 BAJ12.4%
——4Coder before 2.29.17, 2.30.0 before 2.32.7, 2.33.0 before 2.33.8, and 2.34.0 before 2.34.2 contains a user enumeration vulnerability because userpassword.Compare() substitutes a placeholder hash derived from the string "hunter2" when a stored password hash is empty. Unauthenticated attackers can submit logins with the password "hunter2" and distinguish HTTP 403 from 401 responses to enumerate valid accounts and reveal the authentication provider of SSO-only users.20hCVE-2026-1109265.3 MED21.6%
——6A flaw was found in OpenSSH. When compression is negotiated, channels on the same connection share one LZ77 dictionary. A peer who can write on one channel can recover plaintext from another channel by chosen-plaintext lengths.20hCVE-2026-1101413.1 BAJ7.0%
——2Observable discrepancy in Media in Google Chrome prior to 155.0.8059.79 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: High)6dCVE-2026-977887.5 ALT51.4%
——15Observable discrepancy in Active Directory Federation Services (AD FS) allows an unauthorized attacker to disclose information over a network.4dCVE-2026-977826.8 MED43.7%
——13Observable discrepancy in Microsoft Office SharePoint allows an authorized attacker to perform tampering over a network.6d