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CVE-2026-19603: Insertion of Sensitive Information Into Sent Data

🗓️ 16 Oct 2026 00:00:00Reported by Rapid7Type 
rapid7
 rapid7
🔗 www.rapid7.com👁 1 Views

Authenticated user can learn private channel IDs via Mattermost user status API.

Related
Refs
ReporterTitlePublishedViews
Family
circl
Circl
CVE-2026-19603
16 Oct 202608:03
–circl
cnnvd
CNNVD
Mattermost information leakage vulnerability
15 Oct 202616:00
–cnnvd
cve
CVE
CVE-2026-19603
16 Oct 202607:02
–cve
cvelist
Cvelist
CVE-2026-19603 Private channel ID disclosure via user status endpoints
16 Oct 202607:02
–cvelist
euvd
EUVD
EUVD-2026-102742
16 Oct 202607:02
–euvd
mend
Mend
CVE-2026-19603
16 Oct 202607:02
–mend
nvd
NVD
CVE-2026-19603
16 Oct 202607:17
–nvd
ptsecurity
Positive Technologies
PT-2026-115517
16 Oct 202600:00
–ptsecurity
vulnrichment
Vulnrichment
CVE-2026-19603 Private channel ID disclosure via user status endpoints
16 Oct 202607:02
–vulnrichment

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16 Oct 2026 00:00Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.14.3
EPSS0.00176
SSVC
1