CVE-2026-27833: Piwigo is an open source photo gallery application for the web

Q: How do I fix CVE-2026-27833?

piwigo: upgrade to 16.3.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-27833 being exploited?

CVE-2026-27833 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-27833 affect?

CVE-2026-27833 affects piwigo. Severity is high (CVSS 7.5). 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 his

Q: How urgent is CVE-2026-27833?

Priority 55/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2026-27833 is a high-severity flaw (CVSS 7.5) affecting piwigo. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.6% (top 24%)
CISA exploited list	No
Weakness	CWE-862
Published	2026-04-03
Last modified	2026-07-24

Publisher (CNA): GitHub, Inc. · Vendor: piwigo

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-03 22:16 UTCPublished CVE record published
2026-07-24 22:10 UTCUpdated Record last modified

piwigo piwigo UPGRADE

Affected: < 16.3.0

Fixed in: 16.3.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy piwigo || rpm -q piwigo || piwigo --version

2. UPGRADE to 16.3.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade piwigo

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade piwigo

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

Fedora 46 · python-googleapis-common-protos · FIXED · 1.75.5-1.fc46~bootstrap · FEDORA-2026-d911c4c4e6 · source

sudo dnf upgrade --advisory=FEDORA-2026-d911c4c4e6

Fedora ELN · see advisory · FIXED · FEDORA-2026-e3987c278f · source

sudo dnf upgrade --advisory=FEDORA-2026-e3987c278f

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: github.com/Piwigo/Piwigo/security/advisories/GHSA-397m-gfhm-pmg2
Nuclei scan template: Piwigo < 16.3.0 - Unauthenticated Information Disclosure via History API

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-27833?

piwigo: upgrade to 16.3.0. Exact commands for each OS are on this page.

Is CVE-2026-27833 being exploited?

CVE-2026-27833 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-27833 affect?

CVE-2026-27833 affects piwigo. Severity is high (CVSS 7.5). 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 his

How urgent is CVE-2026-27833?

Priority 55/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-27634 CRITICAL 9.8 UPGRADE Piwigo is an open source photo gallery application for the web
CVE-2026-27834 HIGH 7.2 UPGRADE Piwigo is an open source photo gallery application for the web
CVE-2026-27885 HIGH 7.2 UPGRADE Piwigo is an open source photo gallery application for the web

References

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