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01 Record

CVE-2026-111235

OpenNMS REST authorization bypass via non-canonical HTTP method

CriticalPUBLISHEDCNA: OpenNMS
CNA base score9.1 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

02 Description

OpenNMS REST authorization bypass via non-canonical HTTP method

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.37% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 31.3% of scored records. A rank, not a probability.
NVD base score
9.1 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
NVD analysis status
Awaiting Analysis. NVD last modified this record on 2026-10-16.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-10-15 18:45Z13 DAYS AGO
Last updated
2026-10-16 19:59Z12 DAYS AGO
Reserved
2026-10-15
Assigning CNA
OpenNMS
Record state
PUBLISHED
Severity
Critical (CVSS 9.1)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weaknesses
  • CWE-204Observable Response DiscrepancyBase
  • CWE-862Missing AuthorizationClass
  • CWE-863Incorrect AuthorizationClass
Data version
5.2
Document digest
3f98fec997856af7bbeaa7b480561abbd8c75cc7c77bd38868ab82e72bf5f244

05 Affected products

VendorProductVersionsPlatforms
The OpenNMS GroupMeridian2024.1.0 to < 2024.3.14, 2025.0.0 to < 2025.0.11, 2026.0.0 to < 2026.0.1—
The OpenNMS GroupHorizon36.0.0 to < 36.0.5—

06 References

07 Remediation

Upgrade to Meridian 2024.3.14, 2025.0.11, 2026.0.1 and Horizon 36.0.5 or newer.