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CVE-2021-44716

HIGH severity · CVSS 7.5 · Uncontrolled resource consumption
7.5CVSS HIGH

Summary

net/http in Go before 1.16.12 and 1.17.x before 1.17.5 allows uncontrolled memory consumption in the header canonicalization cache via HTTP/2 requests.

Impact & exploitability

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)0%

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products we track (1)

Go

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Official patch: https://groups.google.com/g/golang-announce/c/hcmEScgc00k ↗

Last checked: Wed, 10 Jun 2026 22:18:30 UTC