CVE-2026-15542

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 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

0.70% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 50.2% 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:L/VA:L/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 2026-07-15.

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

2026-07-13 07:00Z1 MO AGO

Last updated

2026-07-15 14:10Z1 MO AGO

Reserved

2026-07-12

Assigning CNA

VulDB

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:L/VA:L/SC:N/SI:N/SA:N/E:X

Weaknesses

• CWE-287Improper AuthenticationClass

Data version

5.2

Document digest

ffa6cf20ef299fa84e129a1507e633a7339f854c8dd37630468ff9be2d4246f8

• vuldb.comVDB-377892 | will-moss Isaiah Websocket Connection Authentication main.go improper authenticationhttps://vuldb.com/vuln/377892vdb-entry
• vuldb.comVDB-377892 | CTI Indicators (IOB, IOC, IOA)https://vuldb.com/vuln/377892/ctisignaturepermissions-required
• vuldb.comCVE-2026-15542 | CVE Analysis and Reporthttps://vuldb.com/cve/CVE-2026-15542third-party-advisory
• vuldb.comSubmit #855075 | will-moss Isaiah 1.36.9 CWE-287 Improper Authenticationhttps://vuldb.com/submit/855075third-party-advisory
• github.comhttps://github.com/will-moss/isaiah/issues/33issue-tracking
• github.comhttps://github.com/will-moss/isaiah/pull/36issue-trackingpatch
• github.comhttps://github.com/will-moss/isaiah/product