openssl_encrypt before 1.4.9 Remote Code Execution via Plugin
Published Aug 27, 2026 · Updated Oct 23, 2026 · Also known as GHSA-587j-4r3v-cm2c, PYSEC-2026-3802
Original summary
Normalized public record · Updated Oct 23, 2026
openssl_encrypt before 1.4.9 Remote Code Execution via Plugin
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
openssl_encrypt before 1.4.9 executes untrusted third-party plugins with insufficient controls: the plugin signature policy defaulted to WARN, so an unsigned/unverifiable non-built-in plugin was compiled and executed in the host process at import time, before the runtime sandbox is installed. The only default gate was an incomplete, bypassable AST denylist. If a user is induced to load an attacker's plugin, this results in arbitrary code execution with the privileges of the user running openssl_encrypt. Fixed in 1.4.9 by defaulting the signature policy to ENFORCE for non-built-in plugins.
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- MEDIUM
- Confidence
- 10%
- Aliases
- GHSA-587j-4r3v-cm2c, PYSEC-2026-3802
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
- Security advisory ↗
- VulnCheck Advisory: openssl_encrypt before 1.4.9 Remote Code Execution via Plugin ↗
Record history
Published Aug 27, 2026 · Last refreshed Oct 23, 2026