CVE-2026-3783

MEDIUM

5.3

Description

When an OAuth2 bearer token is used for an HTTP(S) transfer, and that transfer performs a redirect to a second URL, curl could leak that token to the second hostname under some circumstances. If the hostname that the first request is redirected to has information in the used .netrc file, with either of the `machine` or `default` keywords, curl would pass on the bearer token set for the first host also to the second one.

CVE Details

CVSS v3.1 Score5.3

SeverityMEDIUM

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published3/11/2026

Last Modified3/12/2026

Sourcenvd

Honeypot Sightings0

Affected Products

haxx:curl

Weaknesses (CWE)

CWE-522

References

https://curl.se/docs/CVE-2026-3783.html(2499f714-1537-4658-8207-48ae4bb9eae9)

https://curl.se/docs/CVE-2026-3783.json(2499f714-1537-4658-8207-48ae4bb9eae9)

https://hackerone.com/reports/3583983(2499f714-1537-4658-8207-48ae4bb9eae9)

http://www.openwall.com/lists/oss-security/2026/03/11/2(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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