CVE-2026-1842 HyperCloud Improper Refresh Token Validation and Access Token Invalidation Allows Long-Term Unauthorized Access
Attackers with disclosed tokens can maintain long-term unauthorized access to HyperCloud resources due to improper refresh token validation and lack of access token invalidation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-1842?
CVE-2026-1842 is a medium-severity authentication bypass vulnerability in SoftIron HyperCloud, published on 20 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-613
Which versions are affected by CVE-2026-1842?
How do I fix CVE-2026-1842?
No fix has been published for CVE-2026-1842 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-1842 being exploited?
There is no known exploitation of CVE-2026-1842 in the wild and no public exploit code.
Sources
Also known as GHSA-2x2g-fcpp-7fr9.