Adminer is open-source database management software. Adminer v5.4.1 and earlier has a version check mechanism where adminer.org sends signed version info via JavaScript postMessage, which the browser then POSTs to ?script=version. This endpoint lacks origin validation and accepts POST data from any source. An attacker can POST version[] parameter which PHP converts to an array. On next page load, openssl_verify() receives this array instead of string and throws TypeError, returning HTTP 500 to all users. Upgrade to Adminer 5.4.2.
CVE-2026-25892
This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 1.6%, top 27% of all CVEs by exploit prediction. 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).
- High severity, but no confirmed exploitation yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.5
- EG Score
- 7.5(medium)
- EG Risk
- 65(Track)EG Risk 65/100SSVC: Track
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 computedSeverity75% × 45%Exploitation40% × 40%Automatability100% × 15%Action: Routine — remediate on your standard cadence. - EPSS
- 73.0%
- KEV
- Not listed
Published
February 9, 2026
Last Modified
February 20, 2026
References (3)
- security-advisories@githubhttps://github.com/vrana/adminer/commit/21d3a3150388677b18647d68aec93b7850e457d3
- security-advisories@githubhttps://github.com/vrana/adminer/releases/tag/v5.4.2
- security-advisories@githubhttps://github.com/vrana/adminer/security/advisories/GHSA-q4f2-39gr-45jh
Affected Packages
(1 across 1 ecosystem)
Packagist(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| vrana/adminer | v4.10 ... v5.4.1 (42 versions) | 5.4.2 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 15× in last 7d / 53× 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.
- 2026-07-23 03:07 UTCEG score recompute
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Publicly available exploits
(1 reference)Working exploit code is in the public domain. Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.
- Nucleihttp/cves/2026/CVE-2026-25892.yamlFirst seen Jan 1, 2026
Adminer 4.6.2 - 5.4.1 Unauthenticated Persistent DoS
Open source ↗
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-25892?
When was CVE-2026-25892 disclosed?
Is CVE-2026-25892 actively exploited?
What is the CVSS score of CVE-2026-25892?
How do I remediate CVE-2026-25892?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-25892
Is Your Infrastructure Affected by CVE-2026-25892?
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