EXPOSURES › CVE-2026-4858

CVE-2026-4858

HIGH

DETAIL

SourceNVD · cve Published2026-05-21 CVSS8.0 Referencehttps://nvd.nist.gov/vuln/detail/CVE-2026-4858 ↗

▸ RECOMMENDED ACTION Patch the affected products and confirm your instances are covered.

PLAYERS IMPLICATED

mattermost · vendor mattermost server · product

DESCRIPTION

Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to check integration URL for path traversal which allows an malicious authenticated user to call an arbitrary API via system admin Mattermost auth token using via path traversal in integration action URL.. Mattermost Advisory ID: MMSA-2026-00640

AFFECTED FEDRAMP PRODUCTS · 0

No correlated FedRAMP products.