CVE-2021-29258

HIGH 7.5CVE-2021-29258 · Published 20/05/2021 · updated 17/06/2026

In short

CVE-2021-29258 is a HIGH (CVSS 7.5) vulnerability affecting envoy (envoyproxy).
Chance of exploitation in the next 30 days (EPSS): 1.8%, higher than 78.2% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
envoy envoyproxy	`= 1.14.6= 1.15.3= 1.16.2= 1.17.1`	No fix yet

Description

An issue was discovered in Envoy 1.14.0. There is a remotely exploitable crash for HTTP2 Metadata, because an empty METADATA map triggers a Reachable Assertion.

References

blog.envoyproxy.io · Vendor Advisory
envoyproxy/envoy-setec#230 · Broken Link
envoyproxy/envoy release v1.14.0 · Third Party Advisory
envoyproxy/envoy security advisory · Not Applicable
envoyproxy/envoy security advisory · Third Party Advisory

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Package

Affected versions

Patched versions

envoy

envoyproxy

= 1.14.6= 1.15.3= 1.16.2= 1.17.1

No fix yet

More vulnerabilities in envoy

See all →