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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2026-8932

39
FAUCET Score

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.

First published: Jul 3, 2026Last modified: Jul 3, 2026

Impacted Technologies

VendorProductVersion(s)CPE
>= 7.7, < 8.21.0CPE matchmatch criteria
cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*
>= 7.10, <= 7.10CPE match
cpe:2.3:a:curl:curl:*:*:*:*:*:*:*:*
>= 7.10.1, <= 7.10.1CPE match
cpe:2.3:a:curl:curl:*:*:*:*:*:*:*:*
>= 7.10.2, <= 7.10.2CPE match
cpe:2.3:a:curl:curl:*:*:*:*:*:*:*:*
>= 7.10.3, <= 7.10.3CPE match
cpe:2.3:a:curl:curl:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.37%
Probability of exploitation in next 30 days
EPSS Percentile
29.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0037 is in the 10th percentile among its peer group of 51,455 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

microsoftpatch availablevia msrc
Product: azl3 curl 8.11.1-9 on Azure Linux 3.0Fixed in: 8.11.1-10
microsoftpatch availablevia msrc
Product: 21549-17084Fixed in: 8.11.1-10

Vendor Advisories (1)

microsoft2026-Jul/CVE-2026-8932Important

incomplete mTLS config matching in conn reuse

Jul 2, 2026

References

curl.se / docs/CVE-2026-8932.html
PatchVendor Advisory
curl.se / docs/CVE-2026-8932.json
Vendor Advisory
hackerone.com / reports/3733910
ExploitIssue TrackingThird Party Advisory