Information disclosure in Capgo
CVE-2026-56282
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.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (31.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 31.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Capgo — versions 0, 12.128.2
Weakness classification (CWE)
References
- github.com/Cap-go/capgo/security/advisories/GHSA-q6gm-xfwr-44f5 (vendor-advisory)
- www.vulncheck.com/advisories/capgo-information-disclosure-via-unauthenticated-r… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-56282?
- CVE-2026-56282 is a medium-severity vulnerability in Capgo, classified under Information Disclosure. CVSS score: 5.3/10. Published 2026-06-20.
- How severe is CVE-2026-56282?
- Medium severity. CVSS v3 base score is 5.3 out of 10.