Is CVE-2026-1842 actively exploited?

No active exploitation of CVE-2026-1842 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-1842 be exploited remotely?

Yes. CVE-2026-1842 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-1842?

CVE-2026-1842 has a CVSS score of 6.2 (MEDIUM) and an EPSS exploitation probability of 0.05%.

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MEDIUM

CVE-2026-1842

CWE-613Published: February 20, 2026· Updated: Feb 20, 2026

6.2

CVSS v3.1

EPSS:0.05%probability of exploitation in 30 daysPercentile:14.1th

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.

NVD Source

Technical Analysis

CVE-2026-1842 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.Low

User InteractionNone

ScopeX

Impact

Confidentiality

Integrity

Availability

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X