Read the docs
TI-2026-73774 Aliases CVE-2026-90989GHSA-wj3w-gf2c-jjrc

Tainacan exposes repository staff email addresses to subscribers

Priority LOW 20CWE-200Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-200.

Summary

The Tainacan WordPress plugin before 1.4.0 does not restrict its reports REST endpoints to users with a management capability. Any authenticated subscriber can read the email addresses of the repository's staff. The weakness is classified as CWE-200. The references include an exploit link.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

The Tainacan WordPress plugin before 1.4.0 does not restrict its reports REST endpoints to users with a management capability, allowing any authenticated subscriber to read the email addresses of the repository's staff.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00232 14th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Tainacan (Unknown): 1.4.0

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
UnknownTainacanbefore 1.4.01.4.0Patch availableCNA
  • Tainacan VendorUnknown Affected before 1.4.0 Fixed in 1.4.0 Patch available CNA

Remediation

Update Tainacan to version 1.4.0 or later, which fixes the flaw. The sources list no fixed version for Tainacan other than 1.4.0.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA Tainacan (Unknown) Fixed in 1.4.0

Timeline

  1. 2026-10-14 Threatist record created from CVE-2026-90989
  2. 2026-10-14 Alias added: GHSA-wj3w-gf2c-jjrc
  3. 2026-10-16 CVSS score added · CISA ADP
  4. 2026-10-16 Weakness changed · CISA ADP
  5. 2026-10-16 CISA SSVC decision points changed

References

Exploit 1

Sources

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