CVE catalog

CVE-2026-3783

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

[CVE catalog]

Severity: Medium · CVSS 5.7CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
Published: Mar 10, 2026, 11:00:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.46% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	curl	sid	`8.23.0-1`	fixed
Debian	curl	forky	`8.22.0-1`	fixed
Debian	curl	trixie	`8.14.1-2+deb13u5`	fixed
Debian	curl	trixie-security	`8.14.1-2+deb13u7`	fixed
Debian	curl	bookworm	`7.88.1-10+deb12u15`	fixed
Debian	curl	bookworm-security	`7.88.1-10+deb12u5`	vulnerable
Cpe	curl	Not reported	`7.88.1-10+deb12u15`	fixed
Cpe	curl	Not reported	`8.5.0-2ubuntu10.8`	fixed
Cpe	libcurl3t64-gnutls	Not reported	`8.5.0-2ubuntu10.8`	fixed
Cpe	libcurl4-doc	Not reported	`8.5.0-2ubuntu10.8`	fixed
Cpe	libcurl4-gnutls-dev	Not reported	`8.5.0-2ubuntu10.8`	fixed
Cpe	libcurl4-openssl-dev	Not reported	`8.5.0-2ubuntu10.8`	fixed
Cpe	libcurl4t64	Not reported	`8.5.0-2ubuntu10.8`	fixed
Cpe	curl	Not reported	`8.19.0`	fixed
Alpine	curl	3.21	`8.14.1-r3`	fixed
Alpine	curl	3.22	`8.14.1-r4`	fixed
Alpine	curl	3.23	`8.19.0-r0`	fixed
Alpine	curl	3.24	`8.19.0-r0`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	curl	source	sid	`8.19.0-1`	not yet assigned	Not reported	Not reported
Debian	curl	source	forky	`8.19.0-1`	not yet assigned	Not reported	Not reported
Debian	curl	source	trixie	`8.14.1-2+deb13u4`	not yet assigned	Not reported	Not reported
Debian	curl	source	bookworm	`7.88.1-10+deb12u15`	not yet assigned	Not reported	Not reported
Cpe	curl	cpe	Not reported	`7.88.1-10+deb12u15`	Not reported	Not reported	Not reported
Cpe	curl	cpe	Not reported	`8.5.0-2ubuntu10.8`	Not reported	Not reported	Not reported
Cpe	libcurl3t64-gnutls	cpe	Not reported	`8.5.0-2ubuntu10.8`	Not reported	Not reported	Not reported
Cpe	libcurl4-doc	cpe	Not reported	`8.5.0-2ubuntu10.8`	Not reported	Not reported	Not reported
Cpe	libcurl4-gnutls-dev	cpe	Not reported	`8.5.0-2ubuntu10.8`	Not reported	Not reported	Not reported
Cpe	libcurl4-openssl-dev	cpe	Not reported	`8.5.0-2ubuntu10.8`	Not reported	Not reported	Not reported
Cpe	libcurl4t64	cpe	Not reported	`8.5.0-2ubuntu10.8`	Not reported	Not reported	Not reported
Cpe	curl	cpe	Not reported	`8.19.0`	Not reported	NVD-CVE-2026-3783	Not reported
Alpine	curl	apk	3.21	`8.14.1-r3`	Not reported	ALPINE-CVE-2026-3783	Not reported
Alpine	curl	apk	3.22	`8.14.1-r4`	Not reported	ALPINE-CVE-2026-3783	Not reported
Alpine	curl	apk	3.23	`8.19.0-r0`	Not reported	ALPINE-CVE-2026-3783	Not reported
Alpine	curl	apk	3.24	`8.19.0-r0`	Not reported	ALPINE-CVE-2026-3783	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[curl]Affected
Details (6)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Fixed · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Fixed · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · amd64 · bookworm-backports
  Fixed · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · arm64 · bookworm-backports
  Fixed · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Affected · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Affected · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
[libcurl3-gnutls]Affected
Source package: [curl]
Details (6)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Fixed · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Fixed · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · amd64 · bookworm-backports
  Fixed · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · arm64 · bookworm-backports
  Fixed · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Affected · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Affected · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
[libcurl3-nss]Affected
Source package: [curl]
Details (4)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Fixed · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Fixed · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Affected · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Affected · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
[libcurl4]Affected
Source package: [curl]
Details (6)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Fixed · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Fixed · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · amd64 · bookworm-backports
  Fixed · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · arm64 · bookworm-backports
  Fixed · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Affected · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Affected · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
[libcurl4-doc]Affected
Source package: [curl]
Details (6)
- 7.88.1-10+deb12u15 · all · bookworm
  Fixed · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u15 · all · bookworm
  Fixed · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · all · bookworm-backports
  Fixed · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · all · bookworm-backports
  Fixed · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u5 · all · bookworm-security
  Affected · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u5 · all · bookworm-security
  Affected · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
[libcurl4-gnutls-dev]Affected
Source package: [curl]
Details (6)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Fixed · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Fixed · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · amd64 · bookworm-backports
  Fixed · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · arm64 · bookworm-backports
  Fixed · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Affected · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Affected · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
[libcurl4-nss-dev]Affected
Source package: [curl]
Details (4)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Fixed · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Fixed · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Affected · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Affected · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
[libcurl4-openssl-dev]Affected
Source package: [curl]
Details (6)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Fixed · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Fixed · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · amd64 · bookworm-backports
  Fixed · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · arm64 · bookworm-backports
  Fixed · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Affected · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Affected · Fixed: 7.88.1-10+deb12u15
  nvd · curl · debian · bookworm; nvd · curl · debian · 12

[Debian 13 (Trixie)]

[curl]Fixed
Details (5)
- 8.14.1-2+deb13u4 · amd64 · trixie
  Fixed · Fixed: 8.14.1-2+deb13u4
  nvd · curl · debian · 13
- 8.14.1-2+deb13u4 · arm64 · trixie
  Fixed · Fixed: 8.14.1-2+deb13u4
  nvd · curl · debian · 13
- 8.21.0-2~bpo13+1 · amd64 · trixie-backports
  Fixed · Fixed: 8.14.1-2+deb13u4
  nvd · curl · debian · 13
- 8.21.0-2~bpo13+1 · arm64 · trixie-backports
  Fixed · Fixed: 8.14.1-2+deb13u4
  nvd · curl · debian · 13
- 8.14.1-2+deb13u7 · amd64 · trixie-security
  Fixed · Fixed: 8.14.1-2+deb13u4
  nvd · curl · debian · 13
[libcurl3t64-gnutls]Fixed
Source package: [curl]
Details (5)
- 8.14.1-2+deb13u4 · amd64 · trixie
  Fixed · Fixed: 8.14.1-2+deb13u4
  nvd · curl · debian · 13
- 8.14.1-2+deb13u4 · arm64 · trixie
  Fixed · Fixed: 8.14.1-2+deb13u4
  nvd · curl · debian · 13
- 8.21.0-2~bpo13+1 · amd64 · trixie-backports
  Fixed · Fixed: 8.14.1-2+deb13u4
  nvd · curl · debian · 13
- 8.21.0-2~bpo13+1 · arm64 · trixie-backports
  Fixed · Fixed: 8.14.1-2+deb13u4
  nvd · curl · debian · 13
- 8.14.1-2+deb13u7 · amd64 · trixie-security
  Fixed · Fixed: 8.14.1-2+deb13u4
  nvd · curl · debian · 13
[libcurl4-doc]Fixed
Source package: [curl]
Details (5)
- 8.14.1-2+deb13u4 · all · trixie
  Fixed · Fixed: 8.14.1-2+deb13u4
  nvd · curl · debian · 13
- 8.14.1-2+deb13u4 · all · trixie
  Fixed · Fixed: 8.14.1-2+deb13u4
  nvd · curl · debian · 13
- 8.21.0-2~bpo13+1 · all · trixie-backports
  Fixed · Fixed: 8.14.1-2+deb13u4
  nvd · curl · debian · 13
- 8.21.0-2~bpo13+1 · all · trixie-backports
  Fixed · Fixed: 8.14.1-2+deb13u4
  nvd · curl · debian · 13
- 8.14.1-2+deb13u7 · all · trixie-security
  Fixed · Fixed: 8.14.1-2+deb13u4
  nvd · curl · debian · 13
[libcurl4-gnutls]Fixed
Source package: [curl]
Details (2)
- 8.21.0-2~bpo13+1 · amd64 · trixie-backports
  Fixed · Fixed: 8.14.1-2+deb13u4
  nvd · curl · debian · 13
- 8.21.0-2~bpo13+1 · arm64 · trixie-backports
  Fixed · Fixed: 8.14.1-2+deb13u4
  nvd · curl · debian · 13
[libcurl4-gnutls-dev]Fixed
Source package: [curl]
Details (5)
- 8.14.1-2+deb13u4 · amd64 · trixie
  Fixed · Fixed: 8.14.1-2+deb13u4
  nvd · curl · debian · 13
- 8.14.1-2+deb13u4 · arm64 · trixie
  Fixed · Fixed: 8.14.1-2+deb13u4
  nvd · curl · debian · 13
- 8.21.0-2~bpo13+1 · amd64 · trixie-backports
  Fixed · Fixed: 8.14.1-2+deb13u4
  nvd · curl · debian · 13
- 8.21.0-2~bpo13+1 · arm64 · trixie-backports
  Fixed · Fixed: 8.14.1-2+deb13u4
  nvd · curl · debian · 13
- 8.14.1-2+deb13u7 · amd64 · trixie-security
  Fixed · Fixed: 8.14.1-2+deb13u4
  nvd · curl · debian · 13
[libcurl4-openssl-dev]Fixed
Source package: [curl]
Details (5)
- 8.14.1-2+deb13u4 · amd64 · trixie
  Fixed · Fixed: 8.14.1-2+deb13u4
  nvd · curl · debian · 13
- 8.14.1-2+deb13u4 · arm64 · trixie
  Fixed · Fixed: 8.14.1-2+deb13u4
  nvd · curl · debian · 13
- 8.21.0-2~bpo13+1 · amd64 · trixie-backports
  Fixed · Fixed: 8.14.1-2+deb13u4
  nvd · curl · debian · 13
- 8.21.0-2~bpo13+1 · arm64 · trixie-backports
  Fixed · Fixed: 8.14.1-2+deb13u4
  nvd · curl · debian · 13
- 8.14.1-2+deb13u7 · amd64 · trixie-security
  Fixed · Fixed: 8.14.1-2+deb13u4
  nvd · curl · debian · 13
[libcurl4t64]Fixed
Source package: [curl]
Details (5)
- 8.14.1-2+deb13u4 · amd64 · trixie
  Fixed · Fixed: 8.14.1-2+deb13u4
  nvd · curl · debian · 13
- 8.14.1-2+deb13u4 · arm64 · trixie
  Fixed · Fixed: 8.14.1-2+deb13u4
  nvd · curl · debian · 13
- 8.21.0-2~bpo13+1 · amd64 · trixie-backports
  Fixed · Fixed: 8.14.1-2+deb13u4
  nvd · curl · debian · 13
- 8.21.0-2~bpo13+1 · arm64 · trixie-backports
  Fixed · Fixed: 8.14.1-2+deb13u4
  nvd · curl · debian · 13
- 8.14.1-2+deb13u7 · amd64 · trixie-security
  Fixed · Fixed: 8.14.1-2+deb13u4
  nvd · curl · debian · 13

Observed: Oct 27, 2026, 9:30:09 AM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]