CVE-2019-19240

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2019-11-22 · updated 2026-06-17
Weakness: CWE-787

Description

Embedthis GoAhead before 5.0.1 mishandles redirected HTTP requests with a large Host header. The GoAhead WebsRedirect uses a static host buffer that has a limited length and can overflow. This can cause a copy of the Host header to fail, leaving that buffer uninitialized, which may leak uninitialized data in a response.

Affected products

EmbedThis GoAhead: before 5.0.1 — fixed in 5.0.1

How to fix

Upgrade to a fixed version: EmbedThis GoAhead 5.0.1. Check the vendor advisory for mitigations.

References

https://github.com/embedthis/goahead/issues/289
https://github.com/embedthis/goahead/issues/290
https://github.com/embedthis/goahead/releases/tag/v5.0.1
https://github.com/embedthis/goahead/issues/289
https://github.com/embedthis/goahead/issues/290
https://github.com/embedthis/goahead/releases/tag/v5.0.1

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