What’s Vulnerable › Vulnerabilities

CVE-2026-56282: Capgo - Information Disclosure via Unauthenticated /replication Endpoint

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-20 · updated 2026-06-23
• Weakness: CWE-200

Description

Capgo before 12.128.2 contains an information disclosure vulnerability in the unauthenticated /replication endpoint that exposes internal PostgreSQL replication telemetry including slot names and WAL LSN positions. Attackers can access this endpoint without authentication to retrieve sensitive infrastructure details such as replication slot names, confirmed_flush_lsn, restart_lsn values, and database error messages for reconnaissance purposes.

Affected products

• Capgo: before 12.128.2 — fixed in 12.128.2

How to fix

Upgrade to a fixed version: Capgo 12.128.2. Check the vendor advisory for mitigations.

References

• https://github.com/Cap-go/capgo/security/advisories/GHSA-q6gm-xfwr-44f5
• https://www.vulncheck.com/advisories/capgo-information-disclosure-via-unauthenticated-replication-endpoint
• https://github.com/Cap-go/capgo/security/advisories/GHSA-q6gm-xfwr-44f5

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