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TI-2021-19724 Aliases CVE-2021-43963GHSA-v978-p5g5-3r76

An issue was discovered in Couchbase Sync Gateway 2.7.0 through 2.8.2.

Priority LOW 36CWE-200Published · Updated

Key facts

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

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

Summary

An issue was discovered in Couchbase Sync Gateway 2.7.0 through 2.8.2. The bucket credentials used to read and write data in Couchbase Server were insecurely being stored in the metadata within sync documents written to the bucket. Users with read access could use these credentials to obtain write access. (This issue does not affect clusters where Sync Gateway is authenticated with X.509 client certificates. This issue also does not affect clusters where shared bucket access is not enabled on Sync Gateway.)

Why it matters now

EPSS 0.00518 44th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:couchbase:sync_gateway:*:*:*:*:*:*:*:*2.7.0 to before 2.8.3VulnerableCouchbase
  • cpe:2.3:a:couchbase:sync_gateway:*:*:*:*:*:*:*:* Versions 2.7.0 to before 2.8.3 Vulnerable ·Couchbase

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-43963
  2. 2026-10-03 Alias added: GHSA-v978-p5g5-3r76

References

Advisory 1

  • TI-2019-06524 In Couchbase Sync Gateway 2.1.2, an attacker with access to the Sync Gateway’s public… CVSS 3.0CRITICAL 9.8
  • TI-2022-14194 An issue was discovered in Couchbase Sync Gateway 3.x before 3.0.2. CVSS 3.1CRITICAL 9.8
  • TI-2020-07257 In Couchbase Server 6.0.3 and Couchbase Sync Gateway through 2.7.0, the Cluster… CVSS 3.1HIGH 7.5
  • TI-2025-32615 An issue was discovered in Couchbase Sync Gateway before 3.2.6. CVSS 3.1HIGH 7.3

Sources

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