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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2026-11564

38
FAUCET Score

libcurl keeps previously used connections in a connection pool for subsequent transfers to reuse if one of them matches the setup. An easy handle that first uses default native CA trust can continue trusting the native platform store after the application switches that same handle to custom CA material for a later transfer.

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

Impacted Technologies

VendorProductVersion(s)CPE
>= 8.17.0, < 8.21.0CPE matchmatch criteria
cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*
>= 8.17.0, <= 8.17.0CPE match
cpe:2.3:a:curl:curl:*:*:*:*:*:*:*:*
>= 8.18.0, <= 8.18.0CPE match
cpe:2.3:a:curl:curl:*:*:*:*:*:*:*:*
>= 8.19.0, <= 8.19.0CPE match
cpe:2.3:a:curl:curl:*:*:*:*:*:*:*:*
>= 8.20.0, <= 8.20.0CPE match
cpe:2.3:a:curl:curl:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.1CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.36%
Probability of exploitation in next 30 days
EPSS Percentile
28.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0036 is in the 6th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (7)

ubuntupatch availablevia ubuntu_usn
Product: curl (bionic)Fixed in: 7.58.0-2ubuntu3.24+esm10
ubuntupatch availablevia ubuntu_usn
Product: curl (focal)Fixed in: 7.68.0-1ubuntu2.25+esm5
ubuntupatch availablevia ubuntu_usn
Product: curl (noble)Fixed in: 8.5.0-2ubuntu10.11
ubuntupatch availablevia ubuntu_usn
Product: curl (questing)Fixed in: 8.14.1-2ubuntu1.5
ubuntupatch availablevia ubuntu_usn
Product: curl (resolute)Fixed in: 8.18.0-1ubuntu2.3
ubuntupatch availablevia ubuntu_usn
Product: curl (trusty)Fixed in: 7.35.0-1ubuntu2.20+esm21
ubuntupatch availablevia ubuntu_usn
Product: curl (xenial)Fixed in: 7.47.0-1ubuntu2.19+esm17

Vendor Advisories (1)

ubuntuUSN-8525-1

curl vulnerabilities

Jul 9, 2026

References

curl.se / docs/CVE-2026-11564.html
PatchVendor Advisory
curl.se / docs/CVE-2026-11564.json
Vendor Advisory
hackerone.com / reports/3788984
ExploitIssue TrackingThird Party Advisory