CVE-2019-19326

Severity: medium (CVSS 5.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-07-15 · updated 2026-06-17
Weakness: CWE-444

Description

Silverstripe CMS sites through 4.4.4 which have opted into HTTP Cache Headers on responses served by the framework's HTTP layer can be vulnerable to web cache poisoning. Through modifying the X-Original-Url and X-HTTP-Method-Override headers, responses with malicious HTTP headers can return unexpected responses to other consumers of this cached response. Most other headers associated with web cache poisoning are already disabled through request hostname forgery whitelists.

Affected products

Silverstripe: from 3.0.0 before 3.7.5; from 4.0.0 before 4.4.7; from 4.5.0 before 4.5.4 — fixed in 3.7.5, 4.4.7, 4.5.4

How to fix

Upgrade to a fixed version: Silverstripe 3.7.5, 4.4.7, 4.5.4. Check the vendor advisory for mitigations.

References

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