What is CVE-2026-52856?

CVE-2026-52856 is a high-severity vulnerability in Pterodactyl Wings, classified under Improper Validation of Array Index. CVSS score: 7.5/10. Published 2026-07-31.

How severe is CVE-2026-52856?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Pterodactyl Wings

CVE-2026-52856

Wings is the server control plane for Pterodactyl, a free, open-source game server management panel. Prior to 1.13.0, a malformed packet received during the SFTP connection handshake causes a Go panic. This issue is fixed in version 1.13.0.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Pterodactyl Wings — versions < 1.13.0

Weakness classification (CWE)

CWE-129 — Improper Validation of Array Index
CWE-248
CWE-617 — Reachable Assertion
CWE-755 — Improper Handling of Exceptional Conditions

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-52856?: CVE-2026-52856 is a high-severity vulnerability in Pterodactyl Wings, classified under Improper Validation of Array Index. CVSS score: 7.5/10. Published 2026-07-31.
How severe is CVE-2026-52856?: High severity. CVSS v3 base score is 7.5 out of 10.