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CVE-2024-27919

70
FAUCET Score

CVE-2024-27919 is a denial-of-service vulnerability affecting Envoy versions 1.29.0 and 1.29.1. An attacker can exploit a flaw in the HTTP/2 protocol stack by sending a flood of CONTINUATION frames, leading to unlimited memory consumption and system crashes. This vulnerability has a CVSS score of 7.5 (High), indicating it can be exploited remotely with low complexity and high impact on availability. While there is no known active exploitation or public exploit code, the vulnerability has garnered significant community attention and media coverage, including reports of a new HTTP/2 DoS attack potentially more severe than Rapid Reset.

Impacted Technologies

VendorProductVersion(s)CPE
1.29.0CPE matchmatch criteria
cpe:2.3:a:envoyproxy:envoy:1.29.0:*:*:*:*:*:*:*
1.29.1CPE matchmatch criteria
cpe:2.3:a:envoyproxy:envoy:1.29.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
86.75%
Probability of exploitation in next 30 days
EPSS Percentile
99.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.8675 is in the 100th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2024-27919Important

envoy: CONTINUATION frames which enable DoS

Apr 3, 2024

References

kb.cert.org / vuls/id/421644
github.com / envoyproxy/envoy/commit/57a02565532c18eb9df972a3e8974be3ae59f2d5
Patch
github.com / envoyproxy/envoy/security/advisories/GHSA-gghf-vfxp-799r
PatchThird Party Advisory
openwall.com / lists/oss-security/2024/04/03/16
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2024/04/05/3
Mailing List