CVE-2021-40438.

Source-reported disclosure and enrichment record.

SEVERITY / CVSSUnscoredNo severity score in this snapshot.

EXPLOITATION STATUSCISA known exploitedAdded Dec 01, 2021

RECORD STATUSAwaiting NVD dataModified Dec 01, 2021

Disclosure summary

A crafted request uri-path can cause mod_proxy to forward the request to an origin server choosen by the remote user. This issue affects Apache HTTP Server 2.4.48 and earlier.

CISA remediation guidance

Apply updates per vendor instructions.

Original records & references

NIST NVD record
CVE Program record
CISA KEV catalog entry

PUBLISHED 2021-12-01T00:00:00-05:00
MODIFIED 2021-12-01T00:00:00-05:00
INGESTED 2026-10-06T11:42:59-04:00