CVE-2026-44642

HIGHPre-NVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 1.3% (69th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.3%CVSS: 8.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Piwigo is a full featured open source photo gallery application for the web. Prior to 16.4.0, check_upgrade_access_rights() in admin/include/functions_upgrade.php conditionally escapes the submitted username only when the removed get_magic_quotes_gpc function exists, so PHP 8 and later concatenate an unauthenticated username directly into the upgrade authentication SQL query. When database upgrades are pending, a crafted query result can satisfy the status and password checks, set PHPWG_IN_UPGRADE, and authorize upgrade execution without valid administrator credentials. This can cause unauthorized database integrity changes and service disruption. This vulnerability is fixed in 16.4.0.

CVSS v3
8.1
EG Score
8.1HIGHmedium confidence
EG Risk
41
EG Risk 41/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity81% × 45%
Exploitation1% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
1.3%
EPSS %ILE
69th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 25, 2026

Last Modified

September 25, 2026

Advisory Details (4)

Auto-updated Sep 25, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit, github_release.
github_release Patch Available

16.4.0

Patch available: Piwigo/Piwigo 16.4.0

https://github.com/Piwigo/Piwigo/releases/tag/16.4.0
github_commit

commit 2cfa7a3d194c (Piwigo/Piwigo)

Fix landed in Piwigo/Piwigo commit 2cfa7a3d194c — awaiting tagged release

https://github.com/Piwigo/Piwigo/commit/2cfa7a3d194c8b95edde43038d8f5be5a359e785
github_commit Patch Available

commit 1ff9d04534fe (Piwigo/Piwigo)

Patch available: Piwigo/Piwigo 16.4.0 (contains commit 1ff9d04534fe)

https://github.com/Piwigo/Piwigo/commit/1ff9d04534feb5f8f3cc2d3613c0fe8b51a1c0ba
github Patch Available🟡 PoC Available

SQL injection in upgrade authentication allows unauthenticated upgrade authorization bypass (PHP 8+) · Advisory · Piwigo/Piwigo · GitHub

https://github.com/Piwigo/Piwigo/security/advisories/GHSA-6wj3-7fhw-gfpm

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 19× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-05 09:36 UTCEG score recompute
  2. 2026-10-04 23:22 UTCEPSS rescore
  3. 2026-10-03 21:02 UTCEG score recompute
  4. 2026-10-03 14:25 UTCEPSS rescore
  5. 2026-10-02 20:38 UTCEG score recompute
  6. 2026-10-01 20:09 UTCEG score recompute
  7. 2026-10-01 19:50 UTCEPSS rescore
  8. 2026-09-30 19:45 UTCEG score recompute
  9. 2026-09-30 15:03 UTCEPSS rescore
  10. 2026-09-29 19:20 UTCEG score recompute
  11. 2026-09-29 07:08 UTCEG score recompute
  12. 2026-09-28 18:54 UTCEG score recompute
  13. 2026-09-27 18:29 UTCEG score recompute
  14. 2026-09-27 13:48 UTCEPSS rescore
  15. 2026-09-26 18:06 UTCEG score recompute
  16. 2026-09-26 15:58 UTCEPSS rescore
  17. 2026-09-25 16:26 UTCEG score recompute
  18. 2026-09-25 15:54 UTCEG score recompute
  19. 2026-09-25 15:54 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-44642?
CVE-2026-44642 is a high vulnerability published on September 25, 2026. Piwigo is a full featured open source photo gallery application for the web. Prior to 16.4.0, checkupgradeaccessrights() in admin/include/functionsupgrade.php conditionally escapes the submitted username only when the removed getmagicquotesgpc function exists, so PHP 8 and later concatenate an…
When was CVE-2026-44642 disclosed?
CVE-2026-44642 was first published on September 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-44642 actively exploited?
CVE-2026-44642 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.3% probability of exploitation in the next 30 days (69th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-44642?
CVE-2026-44642 has a CVSS base score of 8.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-44642?
A fix for CVE-2026-44642 is available: update to the fixed version the vendor names in its advisory.

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