🛡️ CVE-2026-9080 — curl

🟠 CVSS 7.3 — High ⚠️ Exploit Public CWE-416 NVD
7.3
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Calling curl_easy_pause() within the event-based CURLMOPT_SOCKETFUNCTION

callback triggers a use-after-free vulnerability, where libcurl attempts to

store a flag using a dangling struct pointer immediately after that pointer's

memory has been freed.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity low, availability low.

Weakness class

CVE-2026-9080 is classified as CWE-416: Use After Free. Memory is used after being released, so its contents may already belong to something else.

Affected software

CVE-2026-9080 is recorded against 1 package.

  • curl (from 8.13.0 up to 8.21.0)

Timeline and source

Published on 3 July 2026 and last revised on 7 July 2026. A public exploit is known to exist, which raises the urgency of patching considerably. A vendor advisory or fix has been published. Record sourced from NVD.

References

curl.se
curl.se
hackerone.com
hackerone.com

Details

Severity HIGH
CVSS Score 7.3
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CWE CWE-416
Public Exploit ⚠️ Yes
Source NVD
Published 2026-07-03
Updated 2026-08-11
Modified 2026-07-07

Affected Packages

Software From version Fixed in
curl 8.13.0 8.21.0

References

Exploit, Issue Tracking, Third Party Advisory https://hackerone.com/reports/3749204
Exploit, Issue Tracking, Third Party Advisory https://hackerone.com/reports/3749204

Exploit Protection

Are you running curl?

CVE-2026-9080 carries CVSS 7.3 High rating and a public exploit already exists. BotEraser checks your installation against this and other known CVE records, and blocks IPs associated with exploit activity.

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