CVE-2026-86777

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• 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

0.56% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 46.3% of scored records. A rank, not a probability.

NVD base score

6.9 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/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

NVD analysis status

Deferred. NVD last modified this record on 2026-09-10.

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.

Published

2026-09-09 10:07Z1 MO AGO

Last updated

2026-09-09 14:04Z1 MO AGO

Reserved

2026-09-08

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

Medium (CVSS 6.9)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Weaknesses

• CWE-862Missing AuthorizationClass

Data version

5.2

Document digest

c7c89d3d3b2b7c95d04cc8bd2644d2b11cdc10c1fa7f894b7a9593066e85c9d5

• github.comGitHub Security Advisory (GHSA-wppq-8h64-w78r)https://github.com/AlchemyCMS/alchemy_cms/security/advisories/GHSA-wppq-8h64-w78rvendor-advisory
• github.comFix commit (8.3.6)https://github.com/AlchemyCMS/alchemy_cms/commit/5e2cd16a806c9d2df3eb6e3c889402487e0085b6patch
• github.comFix commit (7.4.16)https://github.com/AlchemyCMS/alchemy_cms/commit/9bdb98496d6f17277ed05dd1abc3188f880aa554patch
• github.comVulnerable Api::NodesController#index at v8.3.5https://github.com/AlchemyCMS/alchemy_cms/blob/v8.3.5/app/controllers/alchemy/api/nodes_controller.rbtechnical-description
• github.comalchemy_cms v8.3.6 Release Noteshttps://github.com/AlchemyCMS/alchemy_cms/releases/tag/v8.3.6release-notes
• github.comalchemy_cms v7.4.16 Release Noteshttps://github.com/AlchemyCMS/alchemy_cms/releases/tag/v7.4.16release-notes
• github.comhttps://github.com/AlchemyCMS/alchemy_cmsproduct
• www.vulncheck.comVulnCheck Advisory: AlchemyCMS before 7.4.16 and 8.x before 8.3.6 Missing Authorization on GET /api/nodeshttps://www.vulncheck.com/advisories/alchemycms-before-7.4.16-and-8-x-before-8.3.6-missing-authorization-on-get-api-nodesthird-party-advisory