Detections
Analytics

SCA: security update for cinny (GHSA-j944-w549-3453)

high Tenable Self-Hosted Container Security Plugin ID 441483

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Cinny is a Matrix client. Prior to 4.10.3, A remote authenticated attacker who shares a room with a victim
 and has permissions to create room emotes (for example in a DM) can cause the victim's client to send
 their Matrix access token to an attacker-controlled server. This occurs when the victim opens the emoji or
 sticker picker for the room containing a malicious emote pack. This is caused by an incorrect fallback in
 EmojiBoard that uses untrusted pack.meta.avatar (user-controlled) without converting/validating it as an
 MXC URL, allowing arbitrary HTTP(S) URLs to be used. Also, the service worker attaching the user's
 Authorization bearer token to all outbound GET requests whose URL contains
 /_matrix/client/v1/media/download or /_matrix/client/v1/media/thumbnail without verifying the request host
 matches the configured homeserver origin. An attacker-controlled URL containing those path fragments and
 permissive CORS will receive the victim's Authorization header (access token). This vulnerability is fixed
 in 4.10.3. (CVE-2026-42553)

Solution

Update the cinny library and its related packages to version 4.10.3 or later.

See Also

https://github.com/advisories/GHSA-j944-w549-3453

Plugin Details

Severity: High

ID: 441483

Version: Revision 1.5

Type: Local

Family: SCA Checks

Published: 5/7/2026

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.67

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS Score Source: CVE-2026-42553

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 7.1

Threat Score: 4.9

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 5/7/2026

Vulnerability Publication Date: 5/7/2026

Reference Information

CVE: CVE-2026-42553

cwe: CWE-20