How severe is CVE-2026-27634?

CVE-2026-27634 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-27634 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-27634?

CVE-2026-27634 affects Piwigo. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-27634?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-27634 have an EU (EUVD) identifier?

Yes. CVE-2026-27634 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18868.

When was CVE-2026-27634 published?

CVE-2026-27634 was published on 2026-04-03 and last updated on 2026-06-17.

CVE-2026-27634

CVE-2026-27634 is a critical-severity vulnerability in Piwigo with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-89.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 8.7
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-18868
Weakness: CWE-89
Affected product: Piwigo
Published: 2026-04-03
Last modified: 2026-06-17

Description

Piwigo is an open source photo gallery application for the web. Prior to version 16.3.0, the four date filter parameters (f_min_date_available, f_max_date_available, f_min_date_created, f_max_date_created) in ws_std_image_sql_filter() are concatenated directly into SQL without any escaping or type validation. This could result in an unauthenticated attacker reading the full database, including user password hashes. This issue has been patched in version 16.3.0.

Frequently asked questions

What is CVE-2026-27634?: Piwigo is an open source photo gallery application for the web. Prior to version 16.3.0, the four date filter parameters (f_min_date_available, f_max_date_available, f_min_date_created, f_max_date_created) in ws_std_image_sql_filter() are concatenated directly into SQL without any escaping or type validation. This could result in an unauthenticated attacker reading the full database, including user password hashes. This issue has been patched in version 16.3.0.
How severe is CVE-2026-27634?: CVE-2026-27634 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-27634 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-27634?: CVE-2026-27634 affects Piwigo. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-27634?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-27634 have an EU (EUVD) identifier?: Yes. CVE-2026-27634 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18868.
When was CVE-2026-27634 published?: CVE-2026-27634 was published on 2026-04-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:piwigo:piwigo:*:*:*:*:*:*:*:*

More vulnerabilities in Piwigo

CVE-2014-4648 — Critical (CVSS 10.0): Unspecified vulnerability in Piwigo before 2.6.3 has unknown impact and attack vectors, related to a "security failure."
CVE-2023-33362 — Critical (CVSS 9.8): Piwigo 13.6.0 is vulnerable to SQL Injection via in the "profile" function.
CVE-2023-33361 — Critical (CVSS 9.8): Piwigo 13.6.0 is vulnerable to SQL Injection via /admin/permalinks.php.
CVE-2020-19213 — Critical (CVSS 9.8): SQL Injection vulnerability in cat_move.php in piwigo v2.9.5, via the selection parameter to move_categories.
CVE-2021-32615 — Critical (CVSS 9.8): Piwigo 11.4.0 allows admin/user_list_backend.php order[0][dir] SQL Injection.
CVE-2017-10682 — Critical (CVSS 9.8): SQL injection vulnerability in the administrative backend in Piwigo through 2.9.1 allows remote users to execute…

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