CVE-2022-32205Public exploitNetwork attack vector

HTTP request denial via unbounded cookie accumulation

Published Jul 7, 2022 · Updated May 5, 2025

Denial of service in curl 7.71.0 through 7.83.1 allows remote attackers to interrupt HTTP requests via excessive Set-Cookie headers. curl stores every received cookie without per-response, outbound-count, or Cookie-header-size limits, so matching cookies can push a later request above its 1,048,576-byte internal ceiling and trigger an error. The target must enable cookie handling and contact the malicious server; domain matching can also block requests to a sibling host until the stored cookies expire or are removed.

CVSS severity4.3
Medium
EPSS probability27.08%
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 curl 7.71.0 through 7.83.1 allows remote attackers to interrupt HTTP requests via excessive Set-Cookie headers. curl stores every received cookie without per-response, outbound-count, or Cookie-header-size limits, so matching cookies can push a later request above its 1,048,576-byte internal ceiling and trigger an error. The target must enable cookie handling and contact the malicious server; domain matching can also block requests to a sibling host until the stored cookies expire or are removed.

The record

CVE
CVE-2022-32205
Published
Jul 7, 2022
Updated
May 5, 2025
Vendor
curl
Product
curl
Classifications
CWE-770, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 7, 2022CVE publishedPublication date reported by the CVE source.
  2. May 5, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=Fixed in 7.84.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

curl · curlversion=Fixed in 7.84.0

Published CVSS scores

4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
4.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:N/A:P

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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499Endpoint Denial of Service

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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