CVE-2026-94266

password leak in CURLINFO_EFFECTIVE_URL

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Published Oct 20, 2026 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Description
libcurl could accidentally return a URL for `curl_easy_getinfo()`'s
`CURLINFO_EFFECTIVE_URL` option containing credentials, even though neither
the URL provided to libcurl nor the redirected URL did.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Ubuntu USN Ubuntu USN USN-8927-1 curl vulnerabilities
Ubuntu USN Ubuntu USN USN-8932-1 curl vulnerabilities
Ubuntu USN Ubuntu USN USN-8927-2 curl vulnerabilities
History
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 3.3, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'}

 ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}
Type Values Removed Values Added
Description A flaw was found in curl. This vulnerability can lead to information disclosure by inadvertently revealing authentication credentials. When curl retrieves credentials from a local configuration file (such as a .netrc file), requesting the effective URL metadata can cause the returned destination address to improperly include those secret credentials. A local user may exploit this issue to view sensitive authentication tokens if an application or script queries and logs or displays the resolved URL. libcurl could accidentally return a URL for `curl_easy_getinfo()`'s `CURLINFO_EFFECTIVE_URL` option containing credentials, even though neither the URL provided to libcurl nor the redirected URL did.
Title curl: curl: password leak in CURLINFO_EFFECTIVE_URL password leak in CURLINFO_EFFECTIVE_URL
References
Type Values Removed Values Added
First Time appeared Curl
Curl curl
Vendors & Products Curl
Curl curl
Type Values Removed Values Added
Description A flaw was found in curl. This vulnerability can lead to information disclosure by inadvertently revealing authentication credentials. When curl retrieves credentials from a local configuration file (such as a .netrc file), requesting the effective URL metadata can cause the returned destination address to improperly include those secret credentials. A local user may exploit this issue to view sensitive authentication tokens if an application or script queries and logs or displays the resolved URL.
Title curl: curl: password leak in CURLINFO_EFFECTIVE_URL
Weaknesses CWE-522
References
Metrics threat_severity

None

 cvssV3_1

{'score': 3.3, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'}

threat_severity

Low
Weaknesses

Sources

Status
PUBLISHED
Assigner
curl
Published
Updated
Oct 30, 2026, 4:22 PM
Reserved
Sep 21, 2026, 9:07 AM

View source JSON

Updated
Oct 30, 2026, 4:21 PM

JSON

Status
Awaiting Analysis
Published
Oct 20, 2026, 9:17 PM
Modified
Oct 30, 2026, 5:17 PM

View source JSON

Severity
Low
Public date
Oct 14, 2026, 12:00 PM

View source Bugzilla JSON

Updated
Oct 30, 2026, 7:45 PM

JSON