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01 Record

CVE-2026-19182

OpenNMS v2 Alarm REST API inverted authorization check lets ROLE_REST users acknowledge alarms as any user and bypass read-only

MediumPUBLISHEDCNA: OpenNMS
CNA base score4.3 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

02 Description

OpenNMS v2 Alarm REST API inverted authorization check lets ROLE_REST users acknowledge alarms as any user and bypass read-only

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.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited 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
0.25% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 16.7% of scored records. A rank, not a probability.
NVD base score
4.3 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
NVD analysis status
Awaiting Analysis. NVD last modified this record on 2026-09-08.
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
2026-08-13 04:50Z2 MO AGO
Last updated
2026-08-13 13:01Z2 MO AGO
Reserved
2026-08-06
Assigning CNA
OpenNMS
Record state
PUBLISHED
Severity
Medium (CVSS 4.3)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Weaknesses
  • CWE-863Incorrect AuthorizationClass
Data version
5.2
Document digest
1754f2cbaa2c663c57337e0dc31a574fd41155fcec0d87004698c6efa1f5ecdf

05 Affected products

VendorProductVersionsPlatforms
The OpenNMS GroupMeridian2024.1.0 to < 2024.3.12, 2025.0.0 to < 2025.0.9—
The OpenNMS GroupHorizon36.0.0 to < 36.0.3—

06 References

07 Remediation

Upgrade to Meridian 2024.3.12, 2025.0.9 and Horizon 36.0.3 or newer.