HOMEVULNERABILITIESCVE-2024-27919
HIGH

CVE-2024-27919

CWE-390Published: April 4, 2024· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official Description

Envoy is a cloud-native, open-source edge and service proxy. In versions 1.29.0 and 1.29.1, theEnvoy HTTP/2 protocol stack is vulnerable to the flood of CONTINUATION frames. Envoy's HTTP/2 codec does not reset a request when header map limits have been exceeded. This allows an attacker to send an sequence of CONTINUATION frames without the END_HEADERS bit set causing unlimited memory consumption. This can lead to denial of service through memory exhaustion. Users should upgrade to versions 1.29.2 to mitigate the effects of the CONTINUATION flood. Note that this vulnerability is a regression in Envoy version 1.29.0 and 1.29.1 only. As a workaround, downgrade to version 1.28.1 or earlier or disable HTTP/2 protocol for downstream connections.

NVD Source

Technical Analysis

CVE-2024-27919 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

envoyproxy1 product(s)
envoy
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/envoyproxy/envoy/commit/57a02565532c18eb9df972a3e8974be3ae59f2d5
PATCHhttps://github.com/envoyproxy/envoy/security/advisories/GHSA-gghf-vfxp-799r
PATCHhttps://github.com/envoyproxy/envoy/commit/57a02565532c18eb9df972a3e8974be3ae59f2d5
PATCHhttps://github.com/envoyproxy/envoy/security/advisories/GHSA-gghf-vfxp-799r
ADVISORYhttp://www.openwall.com/lists/oss-security/2024/04/03/16
ADVISORYhttp://www.openwall.com/lists/oss-security/2024/04/03/16

All References (9)

→
http://www.openwall.com/lists/oss-security/2024/04/03/16Mailing List · Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2024/04/05/3Mailing List
→
https://github.com/envoyproxy/envoy/commit/57a02565532c18eb9df972a3e8974be3ae59f2d5Patch
→
https://github.com/envoyproxy/envoy/security/advisories/GHSA-gghf-vfxp-799rPatch · Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2024/04/03/16Mailing List · Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2024/04/05/3Mailing List
→
https://github.com/envoyproxy/envoy/commit/57a02565532c18eb9df972a3e8974be3ae59f2d5Patch
→
https://github.com/envoyproxy/envoy/security/advisories/GHSA-gghf-vfxp-799rPatch · Third Party Advisory
→
https://www.kb.cert.org/vuls/id/421644

Quick Facts

CVE IDCVE-2024-27919
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-390
CISA KEVNo
Affected1 vendor(s)
PublishedApr 4, 2024

Related CVEs (CWE-390)

CVE-2021-40391
9.8
CVE-2026-53434
9.1
CVE-2019-5051
8.8
CVE-2025-46367
7.8
CVE-2024-49841
7.8
CVE-2024-30255
7.5

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2024-27919 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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