An issue was discovered in Mattermost Mobile Apps before 1.26.0.
Priority LOW 26CWE-459Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
An issue was discovered in Mattermost Mobile Apps before 1.26.0. Cookie data can persist on a device after a logout.
Why it matters now
EPSS 0.00901 59th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mattermost:mattermost_mobile:*:*:*:*:*:*:*:* | before 1.26.0 | Vulnerable | Mattermost |
- cpe:2.3:a:mattermost:mattermost_mobile:*:*:*:*:*:*:*:* Versions before 1.26.0 Vulnerable ·Mattermost
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2019-20849
- 2026-10-03 Alias added: GHSA-qhj6-chh8-8c88
References
Advisory 1
More Mattermost Mobile vulnerabilities
- TI-2020-11312 An issue was discovered in Mattermost Mobile Apps before 1.29.0. CVSS 3.1HIGH 7.5
- TI-2020-11310 An issue was discovered in Mattermost Mobile Apps before 1.30.0. CVSS 3.1HIGH 7.5
- TI-2019-15070 An issue was discovered in Mattermost Mobile Apps before 1.26.0. CVSS 3.1HIGH 7.5
- TI-2019-15066 An issue was discovered in Mattermost Mobile Apps before 1.26.0. CVSS 3.1HIGH 7.5
- TI-2025-14702 Mobile crash via object that can't be cast to String in Attachment Field CVSS 3.1HIGH 7.5
- TI-2025-14379 Mobile crash via improper validation of proto style in attachments CVSS 3.1HIGH 7.5
Sources
- CVE-2019-20849 · CVE Program
- CVE-2019-20849 · NVD
- FIRST EPSS
- GHSA-qhj6-chh8-8c88 · GitHub Advisory Database · CC BY 4.0
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