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VulnerabilityPublished Updated

CVE-2024-32976: envoyproxy envoy · Infinite Loop

Affects envoyproxy envoySource CVE Database V5

0
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Public exploit available · CVSS 7.5 High.

Data as of 5 Nov 2026, 16:20 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (GitHub_M)CVSS 3.17.5
CISA SSVC
Exploitation
Proof of concept is public or traded
Automatable
Attackers can reliably automate steps 1–4 of the kill chain
Technical impact
Limited control over the software or limited information exposure

CISA SSVC assessment, 2024-09-03.

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

Exploitation evidence

t = 0 is the CVE’s publication on cve.org

  1. Disclosed: evidence found.

    CVE published 4 Jun 2024

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: evidence found.

    CISA SSVC: proof of concept public

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

Timeline

  1. CVE ID reserved

    by GitHub, Inc.

    , 43 days before disclosure

  2. CVE published

    on cve.org

    , t = 0

  3. CISA SSVC assessment

    proof of concept public

    , 91 days after disclosure

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CISA SSVC, the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
envoyproxyenvoyAffected
  • >=1.30.0 <=1.30.1
  • >=1.29.0 <=1.29.4
  • >=1.28.0 <=1.28.3
  • >1.18.0 <=1.27.5
Fixed in–

AI-suggested

Until a fix is applied, consider disabling the Brotli filter if feasible to prevent triggering the infinite loop.

Description

CVE-2024-32976 is a high-severity vulnerability in Envoyproxy's Brotli filter that causes an infinite loop during decompression of Brotli data containing extra input. This flaw affects multiple versions of Envoy from 1.18.0 through 1.30.1. The issue results in a denial of service due to the endless loop but does not impact confidentiality or integrity.

References

Community reviews

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