CVE-2024-45810Public exploitNetwork attack vector

Service crash via stale stream-decoder reference

Published Sep 19, 2024 · Updated Jan 30, 2026

Denial of service in affected Envoy 1.28–1.31 releases allows remote authenticated users to crash the proxy with crafted requests. The HTTP async client's sendLocalReply path destroys a deferred async stream before router.onDestroy() reuses its stream-decoder reference, causing a segmentation fault. Exposure requires request mirroring or ext_authz that permits Upgrade and Connection headers, and the resulting crash stops all proxy traffic.

CVSS severity6.5
Medium
EPSS probability0.64%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in affected Envoy 1.28–1.31 releases allows remote authenticated users to crash the proxy with crafted requests. The HTTP async client's sendLocalReply path destroys a deferred async stream before router.onDestroy() reuses its stream-decoder reference, causing a segmentation fault. Exposure requires request mirroring or ext_authz that permits Upgrade and Connection headers, and the resulting crash stops all proxy traffic.

The record

CVE
CVE-2024-45810
Published
Sep 19, 2024
Updated
Jan 30, 2026
Vendor
Envoy Proxy
Product
Envoy
Classifications
CWE-119, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 19, 2024CVE publishedPublication date reported by the CVE source.
  2. Jan 30, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.28.7
  2. Affected versionversion=>= 1.29.0, < 1.29.9
  3. Affected versionversion=>= 1.30.0, < 1.30.6
  4. Affected versionversion=>= 1.31.0, < 1.31.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Envoy Proxy · Envoyversion=< 1.28.7; version=>= 1.29.0, < 1.29.9; version=>= 1.30.0, < 1.30.6; version=>= 1.31.0, < 1.31.2

Published CVSS scores

7.5NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
6.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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