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CVE-2026-42553
🗓️ 27 May 2026 17:27:26Reported by GitHub_MType 
cve🔗 web.nvd.nist.gov📰️ 1 Media mentions👁 8 Views🌐 WEB
| Reporter | Title | Published | Views | Family All 12 |
|---|---|---|---|---|
 | CVE-2026-42553 | 27 May 202617:27 | – | attackerkb |
 | Cinny 输入验证错误漏洞 | 27 May 202600:00 | – | cnnvd |
 | CVE-2026-42553 Cinny: Access token disclosure via invalidated emoji pack avatar URL in service worker | 27 May 202617:27 | – | cvelist |
 | EUVD-2026-32612 | 27 May 202617:27 | – | euvd |
 | Cinny vulnerable to access token disclosure via invalidated emoji pack avatar URL in service worker | 7 May 202616:40 | – | github |
 | CVE-2026-42553 | 27 May 202618:16 | – | nvd |
 | GHSA-J944-W549-3453 Cinny vulnerable to access token disclosure via invalidated emoji pack avatar URL in service worker | 7 May 202616:40 | – | osv |
 | NPM: Cinny vulnerable to access token disclosure via invalidated emoji pack avatar URL in service worker | 7 May 202616:40 | – | patchstack |
 | PT-2026-38614 | 7 May 202600:00 | – | ptsecurity |
 | CVE-2026-42553 | 5 Jun 202619:16 | – | redhatcve |
10
[
{
"vendor": "cinnyapp",
"product": "cinny",
"versions": [
{
"version": "< 4.10.3",
"status": "affected"
}
]
}
]| Parameter | Position | Path | Description | CWE |
|---|---|---|---|---|
| /_matrix/client/v1/media/download | path | /_matrix/client/v1/media/download | Service worker attaches the user's Authorization header to GET requests whose URL contains this path, allowing exfiltration of the access token to attacker-controlled origins. | CWE-20 |
| _matrix/client/v1/media/thumbnail | path | /_matrix/client/v1/media/download | Service worker attaches the user's Authorization header to GET requests whose URL contains this path, allowing exfiltration of the access token to attacker-controlled origins. | CWE-20 |
| /_matrix/client/v1/media/download | path | /_matrix/client/v1/media/thumbnail | Service worker attaches the user's Authorization header to GET requests whose URL contains this path, allowing exfiltration of the access token to attacker-controlled origins. | CWE-20 |
| _matrix/client/v1/media/thumbnail | path | /_matrix/client/v1/media/thumbnail | Service worker attaches the user's Authorization header to GET requests whose URL contains this path, allowing exfiltration of the access token to attacker-controlled origins. | CWE-20 |
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01 Jun 2026 18:23Current
5.9Medium risk
Vulners AI Score5.9
CVSS 47.1
EPSS0.00165
SSVC