HTTP Response Splitting Affecting vrana/adminer package, versions >=4.6.0, <5.4.3
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PHP-VRANAADMINER-18306755
- published25 Jul 2026
- disclosed20 Jul 2026
- creditUnknown
Introduced: 20 Jul 2026
NewCVE-2026-63771 (opens in a new tab)How to fix?
Upgrade vrana/adminer to version 5.4.3 or higher.
Overview
vrana/adminer is a Database management in a single file.
Affected versions of this package are vulnerable to HTTP Response Splitting via the X-Forwarded-Prefix HTTP header. An attacker can manipulate cookie attributes by injecting arbitrary values into the Set-Cookie path attribute, potentially downgrading SameSite protection and enabling cross-origin authenticated requests by exploiting a misconfigured reverse proxy.