PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-27634 Piwigo CVE debrief

CVE-2026-27634 is a high-severity vulnerability in Piwigo, an open-source photo gallery application. The vulnerability allows an unauthenticated attacker to read the full database, including user password hashes, by exploiting the ws_std_image_sql_filter() function. This function concatenates four date filter parameters directly into SQL without proper escaping or type validation. Users of Piwigo versions prior to 16.3.0 should be aware of this vulnerability and take immediate action to patch their installations. This vulnerability is particularly concerning because it allows an unauthenticated attacker to access sensitive information, including user password hashes. Affected product deployments should be identified and owners assigned for follow-up.

Vendor
Piwigo
Product
Unknown
CVSS
HIGH 8.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-03
Original CVE updated
2026-07-24
Advisory published
2026-04-03
Advisory updated
2026-07-24

Who should care

Users of Piwigo versions prior to 16.3.0, operators, platform administrators, vulnerability management teams, and security teams should be aware of this vulnerability and take immediate action to patch their installations.

Technical summary

The vulnerability exists in the ws_std_image_sql_filter() function of Piwigo, where four date filter parameters (f_min_date_available, f_max_date_available, f_min_date_created, f_max_date_created) are concatenated directly into SQL without any escaping or type validation. This allows an unauthenticated attacker to inject malicious SQL and potentially read the full database, including user password hashes. The vulnerability is particularly concerning due to its potential impact on sensitive information.

Defensive priority

High

Recommended defensive actions

  • Apply the patch from Piwigo version 16.3.0 or later
  • Review and update database credentials and user passwords
  • Implement additional security measures such as web application firewalls and intrusion detection systems
  • Regularly monitor and update Piwigo installations
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record was published on 2026-04-03T22:16:25.720Z and was last modified on 2026-07-24T22:10:00.140Z. The NVD entry is currently Analyzed. The vulnerability exists in Piwigo versions prior to 16.3.0. Evidence is limited to public CVE and NVD information.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-27634 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-27634

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-27634 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-27634

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.