CVE-2026-8927
CVE-2026-8927 · env-set cross-proxy Digest auth state leak
This page contains facts from public vulnerability sources. Check the original advisory before updating.
This page shows selected source facts. See the linked advisories for the complete description and affected versions.
When reusing a libcurl handle for sequential transfers driven by environment-variable proxy configuration, libcurl fails to clear the proxy authentication state between requests. Specifically, if the initial transfer authenticates against `proxyA` using Digest auth, a subsequent transfer routed through `proxyB` erroneously leaks the `Proxy-Authorization:` header intended solely for `proxyA`.
CVSS 9.1 · Critical · EPSS 0.5% · Fix available
- Published
- Updated
Stack: system
Affected products and versions
curl
- Versions
- ≥ 7.12.0, < 8.14.2: Affected (semver)
- ≥ 8.15.0, < 8.16.1: Affected (semver)
- ≥ 8.17.0, < 8.20.1: Affected (semver)
Update to 8.14.2; Update to 8.16.1; Update to 8.20.1
curl
- Versions
- ≥ fc6eff13b5414caf6edf22d73a3239e074a04216, < 5c225384b8d52c67ce8259c6e4203bc57aacb567: Affected (git)
Update to 5c225384b8d52c67ce8259c6e4203bc57aacb567
curl
- Versions
- 8.20.0: Affected
- 8.19.0: Affected
- 8.18.0: Affected
- 8.17.0: Affected
- 8.16.0: Affected
- 8.15.0: Affected
- 8.14.1: Affected
- 8.14.0: Affected
- 8.13.0: Affected
- 8.12.1: Affected
- 8.12.0: Affected
- 8.11.1: Affected
- 8.11.0: Affected
- 8.10.1: Affected
- 8.10.0: Affected
- 8.9.1: Affected
- 8.9.0: Affected
- 8.8.0: Affected
- 8.7.1: Affected
- 8.7.0: Affected
- 8.6.0: Affected
- 8.5.0: Affected
- 8.4.0: Affected
- 8.3.0: Affected
- 8.2.1: Affected
- 8.2.0: Affected
- 8.1.2: Affected
- 8.1.1: Affected
- 8.1.0: Affected
- 8.0.1: Affected
- 8.0.0: Affected
- 7.88.1: Affected
- 7.88.0: Affected
- 7.87.0: Affected
- 7.86.0: Affected
- 7.85.0: Affected
- 7.84.0: Affected
- 7.83.1: Affected
- 7.83.0: Affected
- 7.82.0: Affected
- 7.81.0: Affected
- 7.80.0: Affected
- 7.79.1: Affected
- 7.79.0: Affected
- 7.78.0: Affected
- 7.77.0: Affected
- 7.76.1: Affected
- 7.76.0: Affected
- 7.75.0: Affected
- 7.74.0: Affected
- 7.73.0: Affected
- 7.72.0: Affected
- 7.71.1: Affected
- 7.71.0: Affected
- 7.70.0: Affected
- 7.69.1: Affected
- 7.69.0: Affected
- 7.68.0: Affected
- 7.67.0: Affected
- 7.66.0: Affected
- 7.65.3: Affected
- 7.65.2: Affected
- 7.65.1: Affected
- 7.65.0: Affected
- 7.64.1: Affected
- 7.64.0: Affected
- 7.63.0: Affected
- 7.62.0: Affected
- 7.61.1: Affected
- 7.61.0: Affected
- 7.60.0: Affected
- 7.59.0: Affected
- 7.58.0: Affected
- 7.57.0: Affected
- 7.56.1: Affected
- 7.56.0: Affected
- 7.55.1: Affected
- 7.55.0: Affected
- 7.54.1: Affected
- 7.54.0: Affected
- 7.53.1: Affected
- 7.53.0: Affected
- 7.52.1: Affected
- 7.52.0: Affected
- 7.51.0: Affected
- 7.50.3: Affected
- 7.50.2: Affected
- 7.50.1: Affected
- 7.50.0: Affected
- 7.49.1: Affected
- 7.49.0: Affected
- 7.48.0: Affected
- 7.47.1: Affected
- 7.47.0: Affected
- 7.46.0: Affected
- 7.45.0: Affected
- 7.44.0: Affected
- 7.43.0: Affected
- 7.42.1: Affected
- 7.42.0: Affected
- 7.41.0: Affected
- 7.40.0: Affected
No fix published
curl Debian:12
- Versions
- 7.88.1-10
- 7.88.1-10+deb12u1
- 7.88.1-10+deb12u11
- 7.88.1-10+deb12u12
- 7.88.1-10+deb12u13
- 7.88.1-10+deb12u14
- 7.88.1-10+deb12u15
- 7.88.1-10+deb12u1~bpo11+1
- 7.88.1-10+deb12u2
- 7.88.1-10+deb12u3
- 7.88.1-10+deb12u3~bpo11+1
- 7.88.1-10+deb12u4
- 7.88.1-10+deb12u5
- 7.88.1-10+deb12u5~bpo11+1
- 7.88.1-10+deb12u6
- 7.88.1-10+deb12u6~bpo11+1
- 7.88.1-10+deb12u7
- 7.88.1-10+deb12u8
- 7.88.1-10+deb12u9
- 7.88.1-11
- 8.0.1-1~exp1
- 8.10.0-1
- 8.10.0-2
- 8.10.1-1
- 8.10.1-1~bpo12+1
- 8.10.1-2
- 8.11.0-1
- 8.11.1-1
- 8.11.1-1~bpo12+1
- 8.12.0+git20250209.89ed161+ds-1
- 8.12.0+git20250209.89ed161+ds-1~bpo12+1
- 8.12.1-1
- 8.12.1-2
- 8.12.1-2~bpo12+1
- 8.12.1-3
- 8.12.1-3~bpo12+1
- 8.13.0-1
- 8.13.0-1+exp1
- 8.13.0-2
- 8.13.0-2+exp1
- 8.13.0-3
- 8.13.0-4
- 8.13.0-4+exp1
- 8.13.0-5
- 8.13.0-5+exp1
- 8.13.0-5~bpo12+1
- 8.13.0~rc-1~exp1
- 8.13.0~rc-1~exp2
- 8.13.0~rc2-1
- 8.13.0~rc2-2
- 8.13.0~rc3-1
- 8.13.0~rc3-1+exp1
- 8.14.0-1
- 8.14.0-1+exp1
- 8.14.0~rc1-1+exp1
- 8.14.0~rc2-1+exp1
- 8.14.0~rc3-1+exp1
- 8.14.1-1
- 8.14.1-1~bpo12+1
- 8.14.1-2
- 8.14.1-2+exp1
- 8.14.1-2~bpo12+1
- 8.15.0-1
- 8.15.0-1~bpo13+1
- 8.15.0-1~exp1
- 8.15.0~rc1-1exp1
- 8.15.0~rc2-1~exp1
- 8.15.0~rc3-1~exp1
- 8.16.0-1
- 8.16.0-1+exp1
- 8.16.0-1~bpo13+1
- 8.16.0-2
- 8.16.0-3
- 8.16.0-4
- 8.16.0-4~bpo13+1
- 8.16.0~rc1-1~exp1
- 8.16.0~rc2-1
- 8.16.0~rc2-2
- 8.16.0~rc3-1
- 8.17.0-1
- 8.17.0-2
- 8.17.0-3
- 8.17.0~rc1-1~exp1
- 8.17.0~rc2-1
- 8.17.0~rc3-1
- 8.18.0-1
- 8.18.0-1~bpo13+1
- 8.18.0-2
- 8.18.0~rc1-1+exp1
- 8.18.0~rc2-1
- 8.18.0~rc3-1
- 8.19.0-1
- 8.19.0-1+exp1
- 8.19.0-1~bpo13+1
- 8.19.0-2
- 8.19.0-3
- 8.19.0-3+exp1
- 8.19.0-3+exp2
- 8.19.0~rc1-1~exp1
- 8.19.0~rc2-1
- 8.19.0~rc2-2
- 8.19.0~rc3-1
- 8.2.1-1
- 8.2.1-2
- 8.2.1-2~bpo12+1
- 8.20.0-1
- 8.20.0-1+exp
- 8.20.0-2
- 8.20.0-2+exp1
- 8.20.0-2~bpo13+1
- 8.20.0-3
- 8.20.0-4
- 8.20.0-5
- 8.20.0-5~bpo13+1
- 8.20.0~rc1-1+exp1
- 8.20.0~rc1-1+exp2
- 8.20.0~rc1-1+exp3
- 8.20.0~rc2-1
- 8.20.0~rc2-1+exp1
- 8.20.0~rc3-1
- 8.20.0~rc3-1+exp1
- 8.21.0-1
- 8.21.0-1+exp1
- 8.21.0-2
- 8.21.0-2+exp1
- 8.21.0-2~bpo13+1
- 8.21.0~rc1-1+exp1
- 8.21.0~rc2-1
- 8.21.0~rc2-1+exp1
- 8.21.0~rc3-1
- 8.21.0~rc3-1+exp1
- 8.22.0-1
- 8.22.0-1+exp1
- 8.22.0~rc2-1
- 8.22.0~rc2-2
- 8.22.0~rc3-1
- 8.22.0~rc3-1+exp1
- 8.23.0~rc1-1
- 8.23.0~rc1-2
- 8.23.0~rc2-1
- 8.23.0~rc2-1+exp1
- 8.23.0~rc3-1
- 8.23.0~rc3-1+exp1
- 8.3.0-1
- 8.3.0-2
- 8.3.0-2~bpo12+1
- 8.3.0-2~exp1
- 8.3.0-3
- 8.4.0-1
- 8.4.0-2
- 8.4.0-2~bpo12+1
- 8.5.0-1
- 8.5.0-1+exp1
- 8.5.0-2
- 8.5.0-2+exp1
- 8.5.0-2~bpo12+1
- 8.6.0-1
- 8.6.0-1.1
- 8.6.0-2
- 8.6.0-3
- 8.6.0-3.1
- 8.6.0-3.1~exp1
- 8.6.0-3.1~exp2
- 8.6.0-3.2
- 8.6.0-4
- 8.7.1-1
- 8.7.1-1+exp1
- 8.7.1-2
- 8.7.1-3
- 8.7.1-4
- 8.7.1-5
- 8.7.1-5+exp1
- 8.7.1-5~bpo12+1
- 8.8.0-1
- 8.8.0-1+exp1
- 8.8.0-1+exp2
- 8.8.0-1~bpo12+1
- 8.8.0-2
- 8.8.0-3
- 8.8.0-4
- 8.9.0-1
- 8.9.0-2
- 8.9.0-3
- 8.9.1-1
- 8.9.1-2
- 8.9.1-2~bpo12+1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
curl Debian:13
- Versions
- 8.14.1-2
- 8.14.1-2+deb13u1
- 8.14.1-2+deb13u2
- 8.14.1-2+deb13u2~bpo13+1
- 8.14.1-2+deb13u3
- 8.14.1-2+deb13u4
- 8.14.1-2+deb13u5
- Affected ranges
- ECOSYSTEM: < 8.14.1-2+deb13u7
Update to 8.14.1-2+deb13u7
curl Debian:14
- Versions
- 8.14.1-2
- 8.14.1-2+exp1
- 8.15.0-1
- 8.15.0-1~bpo13+1
- 8.15.0-1~exp1
- 8.15.0~rc1-1exp1
- 8.15.0~rc2-1~exp1
- 8.15.0~rc3-1~exp1
- 8.16.0-1
- 8.16.0-1+exp1
- 8.16.0-1~bpo13+1
- 8.16.0-2
- 8.16.0-3
- 8.16.0-4
- 8.16.0-4~bpo13+1
- 8.16.0~rc1-1~exp1
- 8.16.0~rc2-1
- 8.16.0~rc2-2
- 8.16.0~rc3-1
- 8.17.0-1
- 8.17.0-2
- 8.17.0-3
- 8.17.0~rc1-1~exp1
- 8.17.0~rc2-1
- 8.17.0~rc3-1
- 8.18.0-1
- 8.18.0-1~bpo13+1
- 8.18.0-2
- 8.18.0~rc1-1+exp1
- 8.18.0~rc2-1
- 8.18.0~rc3-1
- 8.19.0-1
- 8.19.0-1+exp1
- 8.19.0-1~bpo13+1
- 8.19.0-2
- 8.19.0-3
- 8.19.0-3+exp1
- 8.19.0-3+exp2
- 8.19.0~rc1-1~exp1
- 8.19.0~rc2-1
- 8.19.0~rc2-2
- 8.19.0~rc3-1
- 8.20.0-1
- 8.20.0-1+exp
- 8.20.0-2
- 8.20.0-2+exp1
- 8.20.0-2~bpo13+1
- 8.20.0-3
- 8.20.0-4
- 8.20.0-5
- 8.20.0-5~bpo13+1
- 8.20.0~rc1-1+exp1
- 8.20.0~rc1-1+exp2
- 8.20.0~rc1-1+exp3
- 8.20.0~rc2-1
- 8.20.0~rc2-1+exp1
- 8.20.0~rc3-1
- 8.20.0~rc3-1+exp1
- 8.21.0~rc1-1+exp1
- Affected ranges
- ECOSYSTEM: < 8.21.0~rc2-1
Update to 8.21.0~rc2-1
curl Ubuntu:Pro:14.04:LTS
- Versions
- 7.32.0-1ubuntu1
- 7.33.0-1ubuntu1
- 7.34.0-1ubuntu1
- 7.35.0-1ubuntu1
- 7.35.0-1ubuntu2
- 7.35.0-1ubuntu2.1
- 7.35.0-1ubuntu2.2
- 7.35.0-1ubuntu2.3
- 7.35.0-1ubuntu2.5
- 7.35.0-1ubuntu2.6
- 7.35.0-1ubuntu2.7
- 7.35.0-1ubuntu2.8
- 7.35.0-1ubuntu2.9
- 7.35.0-1ubuntu2.10
- 7.35.0-1ubuntu2.11
- 7.35.0-1ubuntu2.12
- 7.35.0-1ubuntu2.13
- 7.35.0-1ubuntu2.14
- 7.35.0-1ubuntu2.15
- 7.35.0-1ubuntu2.16
- 7.35.0-1ubuntu2.17
- 7.35.0-1ubuntu2.19
- 7.35.0-1ubuntu2.20
- 7.35.0-1ubuntu2.20+esm2
- 7.35.0-1ubuntu2.20+esm3
- 7.35.0-1ubuntu2.20+esm4
- 7.35.0-1ubuntu2.20+esm5
- 7.35.0-1ubuntu2.20+esm6
- 7.35.0-1ubuntu2.20+esm7
- 7.35.0-1ubuntu2.20+esm8
- 7.35.0-1ubuntu2.20+esm9
- 7.35.0-1ubuntu2.20+esm10
- 7.35.0-1ubuntu2.20+esm11
- 7.35.0-1ubuntu2.20+esm12
- 7.35.0-1ubuntu2.20+esm13
- 7.35.0-1ubuntu2.20+esm14
- 7.35.0-1ubuntu2.20+esm15
- 7.35.0-1ubuntu2.20+esm16
- 7.35.0-1ubuntu2.20+esm17
- 7.35.0-1ubuntu2.20+esm18
- 7.35.0-1ubuntu2.20+esm19
- Affected ranges
- ECOSYSTEM: < 7.35.0-1ubuntu2.20+esm20
Update to 7.35.0-1ubuntu2.20+esm20
curl Ubuntu:Pro:16.04:LTS
- Versions
- 7.43.0-1ubuntu2
- 7.45.0-1ubuntu1
- 7.46.0-1ubuntu1
- 7.47.0-1ubuntu1
- 7.47.0-1ubuntu2
- 7.47.0-1ubuntu2.1
- 7.47.0-1ubuntu2.2
- 7.47.0-1ubuntu2.3
- 7.47.0-1ubuntu2.4
- 7.47.0-1ubuntu2.5
- 7.47.0-1ubuntu2.6
- 7.47.0-1ubuntu2.7
- 7.47.0-1ubuntu2.8
- 7.47.0-1ubuntu2.9
- 7.47.0-1ubuntu2.11
- 7.47.0-1ubuntu2.12
- 7.47.0-1ubuntu2.13
- 7.47.0-1ubuntu2.14
- 7.47.0-1ubuntu2.15
- 7.47.0-1ubuntu2.16
- 7.47.0-1ubuntu2.18
- 7.47.0-1ubuntu2.19
- 7.47.0-1ubuntu2.19+esm1
- 7.47.0-1ubuntu2.19+esm2
- 7.47.0-1ubuntu2.19+esm3
- 7.47.0-1ubuntu2.19+esm4
- 7.47.0-1ubuntu2.19+esm5
- 7.47.0-1ubuntu2.19+esm6
- 7.47.0-1ubuntu2.19+esm7
- 7.47.0-1ubuntu2.19+esm8
- 7.47.0-1ubuntu2.19+esm9
- 7.47.0-1ubuntu2.19+esm10
- 7.47.0-1ubuntu2.19+esm11
- 7.47.0-1ubuntu2.19+esm12
- 7.47.0-1ubuntu2.19+esm13
- 7.47.0-1ubuntu2.19+esm15
- Affected ranges
- ECOSYSTEM: < 7.47.0-1ubuntu2.19+esm16
Update to 7.47.0-1ubuntu2.19+esm16
curl Ubuntu:Pro:18.04:LTS
- Versions
- 7.55.1-1ubuntu2
- 7.55.1-1ubuntu2.1
- 7.57.0-1ubuntu1
- 7.58.0-2ubuntu1
- 7.58.0-2ubuntu2
- 7.58.0-2ubuntu3
- 7.58.0-2ubuntu3.1
- 7.58.0-2ubuntu3.2
- 7.58.0-2ubuntu3.3
- 7.58.0-2ubuntu3.5
- 7.58.0-2ubuntu3.6
- 7.58.0-2ubuntu3.7
- 7.58.0-2ubuntu3.8
- 7.58.0-2ubuntu3.9
- 7.58.0-2ubuntu3.10
- 7.58.0-2ubuntu3.12
- 7.58.0-2ubuntu3.13
- 7.58.0-2ubuntu3.14
- 7.58.0-2ubuntu3.15
- 7.58.0-2ubuntu3.16
- 7.58.0-2ubuntu3.17
- 7.58.0-2ubuntu3.18
- 7.58.0-2ubuntu3.19
- 7.58.0-2ubuntu3.20
- 7.58.0-2ubuntu3.21
- 7.58.0-2ubuntu3.22
- 7.58.0-2ubuntu3.23
- 7.58.0-2ubuntu3.24
- 7.58.0-2ubuntu3.24+esm1
- 7.58.0-2ubuntu3.24+esm2
- 7.58.0-2ubuntu3.24+esm3
- 7.58.0-2ubuntu3.24+esm4
- 7.58.0-2ubuntu3.24+esm5
- 7.58.0-2ubuntu3.24+esm7
- 7.58.0-2ubuntu3.24+esm8
- Affected ranges
- ECOSYSTEM: < 7.58.0-2ubuntu3.24+esm9
Update to 7.58.0-2ubuntu3.24+esm9
curl Ubuntu:Pro:20.04:LTS
- Versions
- 7.65.3-1ubuntu3
- 7.65.3-1ubuntu4
- 7.66.0-1ubuntu1
- 7.67.0-2ubuntu1
- 7.68.0-1ubuntu1
- 7.68.0-1ubuntu2
- 7.68.0-1ubuntu2.1
- 7.68.0-1ubuntu2.2
- 7.68.0-1ubuntu2.4
- 7.68.0-1ubuntu2.5
- 7.68.0-1ubuntu2.6
- 7.68.0-1ubuntu2.7
- 7.68.0-1ubuntu2.10
- 7.68.0-1ubuntu2.11
- 7.68.0-1ubuntu2.12
- 7.68.0-1ubuntu2.13
- 7.68.0-1ubuntu2.14
- 7.68.0-1ubuntu2.15
- 7.68.0-1ubuntu2.16
- 7.68.0-1ubuntu2.18
- 7.68.0-1ubuntu2.19
- 7.68.0-1ubuntu2.20
- 7.68.0-1ubuntu2.21
- 7.68.0-1ubuntu2.22
- 7.68.0-1ubuntu2.23
- 7.68.0-1ubuntu2.24
- 7.68.0-1ubuntu2.25
- 7.68.0-1ubuntu2.25+esm2
- 7.68.0-1ubuntu2.25+esm3
- Affected ranges
- ECOSYSTEM: < 7.68.0-1ubuntu2.25+esm4
Update to 7.68.0-1ubuntu2.25+esm4
curl Ubuntu:22.04:LTS
- Versions
- 7.74.0-1.3ubuntu2
- 7.74.0-1.3ubuntu3
- 7.80.0-3
- 7.81.0-1
- 7.81.0-1ubuntu1.1
- 7.81.0-1ubuntu1.2
- 7.81.0-1ubuntu1.3
- 7.81.0-1ubuntu1.4
- 7.81.0-1ubuntu1.6
- 7.81.0-1ubuntu1.7
- 7.81.0-1ubuntu1.8
- 7.81.0-1ubuntu1.10
- 7.81.0-1ubuntu1.11
- 7.81.0-1ubuntu1.13
- 7.81.0-1ubuntu1.14
- 7.81.0-1ubuntu1.15
- 7.81.0-1ubuntu1.16
- 7.81.0-1ubuntu1.17
- 7.81.0-1ubuntu1.18
- 7.81.0-1ubuntu1.19
- 7.81.0-1ubuntu1.20
- 7.81.0-1ubuntu1.21
- 7.81.0-1ubuntu1.22
- 7.81.0-1ubuntu1.23
- 7.81.0-1ubuntu1.24
- Affected ranges
- ECOSYSTEM: < 7.81.0-1ubuntu1.25
Update to 7.81.0-1ubuntu1.25
curl Ubuntu:24.04:LTS
- Versions
- 8.2.1-1ubuntu3
- 8.2.1-1ubuntu3.1
- 8.4.0-2ubuntu1
- 8.5.0-2ubuntu1
- 8.5.0-2ubuntu2
- 8.5.0-2ubuntu8
- 8.5.0-2ubuntu9
- 8.5.0-2ubuntu10
- 8.5.0-2ubuntu10.1
- 8.5.0-2ubuntu10.2
- 8.5.0-2ubuntu10.3
- 8.5.0-2ubuntu10.4
- 8.5.0-2ubuntu10.5
- 8.5.0-2ubuntu10.6
- 8.5.0-2ubuntu10.7
- 8.5.0-2ubuntu10.8
- 8.5.0-2ubuntu10.9
- Affected ranges
- ECOSYSTEM: < 8.5.0-2ubuntu10.10
Update to 8.5.0-2ubuntu10.10
curl Ubuntu:25.10
- Versions
- 8.12.1-3ubuntu1
- 8.13.0-5ubuntu1
- 8.14.1-1ubuntu2
- 8.14.1-1ubuntu3
- 8.14.1-2ubuntu1
- 8.14.1-2ubuntu1.1
- 8.14.1-2ubuntu1.2
- 8.14.1-2ubuntu1.3
- Affected ranges
- ECOSYSTEM: < 8.14.1-2ubuntu1.4
Update to 8.14.1-2ubuntu1.4
curl Ubuntu:26.04:LTS
- Versions
- 8.14.1-2ubuntu1
- 8.17.0-1ubuntu1
- 8.18.0-1ubuntu1
- 8.18.0-1ubuntu2
- 8.18.0-1ubuntu2.1
- Affected ranges
- ECOSYSTEM: < 8.18.0-1ubuntu2.2
Update to 8.18.0-1ubuntu2.2