CURL-CVE-2026-11564

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Source
https://curl.se/docs/CVE-2026-11564.html
Import Source
https://curl.se/docs/CURL-CVE-2026-11564.json
JSON Data
https://api.osv.dev/v1/vulns/CURL-CVE-2026-11564
Aliases
  • CVE-2026-11564
Published
2026-06-24T08:00:00Z
Modified
2026-06-24T14:05:44.935409Z
Summary
Native CA trust persist
Details

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.

Database specific 
{
    "package": "curl",
    "URL": "https://curl.se/docs/CVE-2026-11564.json",
    "last_affected": "8.20.0",
    "issue": "https://hackerone.com/reports/3788984",
    "affects": "lib",
    "severity": "Low",
    "www": "https://curl.se/docs/CVE-2026-11564.html",
    "CWE": {
        "desc": "Improper Certificate Validation",
        "id": "CWE-295"
    }
}
References
Credits
    • Filipe Casal of Trail of Bits in collaboration with OpenAI - FINDER
    • Stefan Eissing - REMEDIATION_DEVELOPER

Affected packages

Git / github.com/curl/curl.git

Affected ranges

Type
SEMVER
Events
Introduced
8.17.0
Fixed
8.21.0
Type
GIT
Repo
https://github.com/curl/curl.git
Events
Introduced
eefd03c572996e5de4dec4fe295ad6f103e0eefc
Fixed
d69bfad3fa3daf5e72331f6870667607828d5891

Affected versions

8.*
8.17.0
8.18.0
8.19.0
8.20.0
Other
curl-8_17_0
curl-8_18_0
curl-8_19_0
curl-8_20_0
rc-8_18_0-1
rc-8_18_0-2
rc-8_18_0-3
rc-8_19_0-1
rc-8_19_0-2
rc-8_19_0-3
rc-8_20_0-1
rc-8_20_0-2
rc-8_20_0-3
rc-8_21_0-1

Database specific

source 
"https://curl.se/docs/CURL-CVE-2026-11564.json"
vanir_signatures_modified 
"2026-06-24T14:05:44Z"
vanir_signatures 
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        "signature_type": "Line",
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        "source": "https://github.com/curl/curl.git/commit/d69bfad3fa3daf5e72331f6870667607828d5891",
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    {
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        "signature_type": "Line",
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]