What is CVE-2026-27833?

CVE-2026-27833 is a high-severity vulnerability in Piwigo, classified under Missing Authorization. CVSS score: 7.5/10. Published 2026-04-03.

How severe is CVE-2026-27833?

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

Auth bypass in Piwigo

CVE-2026-27833

Piwigo is an open source photo gallery application for the web. Prior to version 16.3.0, the pwg.history.search API method in Piwigo is registered without the admin_only option, allowing unauthenticated users to access the full browsing history of all gallery visitors. This issue has been patched in version 16.3.0.

Vulnerability class: Broken Access Control

EPSS: 0.016 (74.0th percentile) — read the EPSS interpretation.

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:H/I:N/A:N.

Affected products

Piwigo — versions < 16.3.0

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2026-27833?: CVE-2026-27833 is a high-severity vulnerability in Piwigo, classified under Missing Authorization. CVSS score: 7.5/10. Published 2026-04-03.
How severe is CVE-2026-27833?: High severity. CVSS v3 base score is 7.5 out of 10.