CVE-2025-70886
Published: 12 February 2026
Summary
CVE-2025-70886 is a high-severity Uncontrolled Resource Consumption (CWE-400) vulnerability in Halo Halo. Its CVSS base score is 7.5 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 41.9th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SC-5 (Denial-of-service Protection) and SI-10 (Information Input Validation).
Deeper analysis
CVE-2025-70886 is a denial-of-service vulnerability affecting Halo versions 2.22.4 and earlier. The flaw, published on 2026-02-12, stems from an issue in the public comment submission endpoint that allows a remote attacker to trigger a DoS condition via a crafted payload. It is linked to CWE-400 (Uncontrolled Resource Consumption) and carries a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H), indicating high severity due to its network accessibility and impact on availability.
The vulnerability can be exploited by any unauthenticated remote attacker with low complexity and no user interaction required. Exploitation involves submitting a specially crafted payload to the public comment endpoint, leading to significant resource exhaustion and high-impact disruption of service availability on the affected Halo instance.
Mitigation details are available in related advisories and discussions, including the GitHub repository at https://github.com/HowieHz/CVE-2025-70886, the Halo project issue tracker at https://github.com/halo-dev/halo/issues/7890, and a technical blog post at https://howiehz.top/archives/halo-comment-payload-tweaker.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-207234
Vulnerability details
An issue in halo v.2.22.4 and before allows a remote attacker to cause a denial of service via a crafted payload to the public comment submission endpoint
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
CVE enables remote exploitation of a public-facing comment endpoint (T1190) via crafted payload to trigger application-level resource exhaustion DoS (T1499.004).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Flaw remediation directly mitigates this CVE by identifying, patching, and deploying fixes for the vulnerable public comment submission endpoint in Halo versions 2.22.4 and earlier.
Denial-of-service protection implements mechanisms like rate limiting and resource quotas to block crafted payloads causing resource exhaustion on the unauthenticated endpoint.
Information input validation enforces checks on payloads submitted to the public comment endpoint to reject malformed inputs that trigger uncontrolled resource consumption.