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TI-2026-02726 Aliases CVE-2026-3155GHSA-qw58-mhg6-q49h

Missing authorization in OneSignal – Web Push Notifications

Priority LOW 15CWE-862Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
High
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-862.

Summary

The OneSignal – Web Push Notifications plugin for WordPress is vulnerable to authorization bypass in versions up to, and including, 3.8.0. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to delete OneSignal metadata for arbitrary posts.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00324 25th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
onesignalOneSignal – Web Push Notificationsup to 3.8.0—No fix listedCNA
  • OneSignal – Web Push Notifications Vendoronesignal Affected up to 3.8.0 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-3155
  2. 2026-10-03 Alias added: GHSA-qw58-mhg6-q49h

References

Other 2

  • TI-2023-12974 OneSignal repository github action command injection CVSS 3.1HIGH 8.1
  • TI-2025-12748 OneSignal – Web Push Notifications <= 3.6.1 - Missing Authorization to Unauthenticated Plugin Settings Update CVSS 3.1MEDIUM 5.3
  • TI-2019-11894 The onesignal-free-web-push-notifications plugin before 1.17.8 for WordPress has XSS via the subdomain parameter. CVSS 3.0MEDIUM 5.4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences