🛡️ CVE-2026-8932 — curl

🟠 CVSS 7.5 — High ⚠️ Exploit Public NVD
7.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

libcurl would reuse a previously created connection even when some mTLS config

related option had been changed that should have prohibited reuse.

libcurl keeps previously used connections in a connection pool for subsequent

transfers to reuse if one of them matches the setup. However, some TLS

settings related to client certificates were left out from the configuration

match checks, making them match too easily. In particular options related to

the private key.

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 none, integrity high, availability none.

Affected software

CVE-2026-8932 is recorded against 1 package.

  • curl (from 7.7 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 7.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE N/A
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 7.7 8.21.0

References

Exploit, Issue Tracking, Third Party Advisory https://hackerone.com/reports/3733910
Exploit, Issue Tracking, Third Party Advisory https://hackerone.com/reports/3733910

Exploit Protection

Are you running curl?

CVE-2026-8932 carries CVSS 7.5 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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