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HCL Hive CVE-2026-21754

| EUVDEUVD-2026-65469 MEDIUM
Sensitive Cookie Without 'HttpOnly' Flag (CWE-1004)
2026-08-25 HCL GHSA-5h4h-m82c-fgmf
5.4
CVSS 3.1 · Vendor: HCL
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Severity by source

Vendor (HCL) PRIMARY
5.4 MEDIUM
AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
vuln.today AI
5.4 MEDIUM

UI:R confirmed by browser-based cookie theft model; C:L and I:L reflect session token exposure without direct system-level impact from the cookie flag flaw alone.

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (HCL).

CVSS VectorVendor: HCL

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

1
Analysis Generated
Aug 25, 2026 - 11:31 vuln.today

DescriptionCVE.org

HCL Hive is affected by multiple infrastructure and network configuration vulnerabilities, which could lead to unauthorized lateral movement, container breakout, and sensitive data exposure within internal communications.

AnalysisAI

Missing HttpOnly cookie flags in HCL Hive expose session tokens and sensitive credentials to client-side script access, enabling session hijacking when combined with cross-site scripting. The CVE description cites broader infrastructure weaknesses - lateral movement, container breakout, and internal communications exposure - suggesting CWE-1004 is one root cause within a cluster of related configuration flaws. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Persist
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Impact
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Vulnerability AssessmentAI

Exploitation User interaction is required - a victim must visit or interact with attacker-controlled content while authenticated to HCL Hive, satisfying the UI:R metric. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS base score of 5.4 Medium, with C:L and I:L, understates the potential blast radius described - lateral movement and container breakout are not Low-impact outcomes. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Consult the HCL vendor advisory at https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0133342 for patched version information, as no exact fix version is provided in available intelligence. … Detailed patch versions, workarounds, and compensating controls in full report.

Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-21754 vulnerability details – vuln.today

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