CVE-2026-1842 — HyperCloud Improper Refresh Token Validation and Access Token Invalidation Allows Long-Term Unauthorized Access

CVE-2026-1842

HyperCloud Improper Refresh Token Validation and Access Token Invalidation Allows Long-Term Unauthorized Access PUBLISHED

Description (CNA)

HyperCloud versions 2.3.5 through 2.6.8 improperly allowed refresh tokens to be used directly for resource access and failed to invalidate previously issued access tokens when a refresh token was used. Because refresh tokens have a significantly longer lifetime (default one year), an authenticated client could use a refresh token in place of an access token to maintain long-term access without token rotation. Additionally, old access tokens remained valid after refresh, enabling concurrent or extended use beyond intended session boundaries. This vulnerability could allow prolonged unauthorized access if a token is disclosed.

Affected (CNA)

Vendor / product	Versions
SoftIron / HyperCloud	affected 2.3.5 before 2.6.9

CWE

CWE-613

References

https://advisories.softiron.cloud/

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.