Security Vulnerabilities
The KTLS receive path decrypted each record in place, assuming that the mbufs holding received data were anonymous and safe to modify. This assumption does not hold for data placed on a socket by sendfile(2), which can reference file-backed memory directly through non-anonymous M_EXTPG pages or EXT_SFBUF mbufs. When the sender transmits such data over a loopback connection without enabling KTLS on the transmit side, the file-backed mbufs reach the receiver's decryption path unchanged. Decrypting a record in place then overwrites the backing file's page cache instead of a private copy of the data.
An unprivileged local user who can read a file can overwrite its contents with data of their choosing by sending the file over a loopback connection on which they have enabled KTLS receive. The write modifies the page cache directly, so it bypasses file flags such as schg and is written back to disk. By overwriting a setuid binary or other trusted file, a local user can escalate privileges, potentially gaining full control of the affected system.
CVSS Score
7.8
EPSS Score
0.002
Published
2026-06-26
Mattermost versions 10.11.x <= 10.11.18, 11.6.x <= 11.6.3, 11.5.x <= 11.5.6 fail to validate attachment URLs against internal or private IP ranges in the Mattermost Agents plugin MCP server which allows an attacker with access to the MCP server in stdio mode to perform server-side request forgery (SSRF) and exfiltrate data from internal network services via supplying internal URLs as file attachments in post creation requests.. Mattermost Advisory ID: MMSA-2026-00635
CVSS Score
6.5
EPSS Score
0.001
Published
2026-06-26
Mattermost versions 10.11.x <= 10.11.18, 11.6.x <= 11.6.3, 11.5.x <= 11.5.6 fail to properly apply markdown image rendering restrictions to AI bot tool result posts, which allows an authenticated attacker to exfiltrate data to an attacker-controlled server via injecting markdown image syntax into tool result content rendered by a victim's client.. Mattermost Advisory ID: MMSA-2026-00619
CVSS Score
3.5
EPSS Score
0.002
Published
2026-06-26
In JetBrains YouTrack before 2026.2.16593 improper authorisation in the app configurations endpoint allowed modifying project settings
CVSS Score
5.3
EPSS Score
0.002
Published
2026-06-26
In JetBrains YouTrack before 2026.2.16593 default role configuration exposed excessive user profile details
CVSS Score
4.3
EPSS Score
0.002
Published
2026-06-26
In JetBrains YouTrack before 2026.2.16593 improper access control allowed reading saved queries and tags
CVSS Score
4.3
EPSS Score
0.002
Published
2026-06-26
In JetBrains YouTrack before 2026.2.16593 the websandbox bridge was vulnerable to a prototype pollution attack
CVSS Score
2.6
EPSS Score
0.002
Published
2026-06-26
In JetBrains YouTrack before 2026.2.16593 improper access control allowed reading users' private data via the comment templates endpoint
CVSS Score
4.3
EPSS Score
0.002
Published
2026-06-26
In JetBrains YouTrack before 2026.2.16593 project settings disclosure via the MCP was possible
CVSS Score
3.1
EPSS Score
0.001
Published
2026-06-26
In JetBrains Kotlin before 2.4.20 code execution was possible via unsafe deserialization in the build cache metadata
CVSS Score
6.7
EPSS Score
0.002
Published
2026-06-26