High severity8.1NVD Advisory· Published Jul 3, 2026· Updated Jul 7, 2026
CVE-2026-8286
CVE-2026-8286
Description
A vulnerability exists where a new transfer that uses STARTTLS to upgrade the connection might reuse an existing live connection even though the TLS configuration mismatches so it should not.
Affected products
14- osv-coords12 versionspkg:apk/chainguard/eco-python-curlpkg:apk/chainguard/eco-python-curl-minimalpkg:apk/chainguard/eco-python-curl-minimal-binpkg:apk/chainguard/eco-python-curl-minimal-devpkg:apk/chainguard/eco-python-curl-minimal-docpkg:apk/chainguard/eco-python-curl-minimal-staticpkg:apk/chainguard/eco-python-curl-nghttp2pkg:apk/chainguard/eco-python-curl-nghttp2-binpkg:apk/chainguard/eco-python-curl-nghttp2-devpkg:apk/chainguard/eco-python-curl-nghttp2-staticpkg:rpm/opensuse/curl&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/curl&distro=openSUSE%20Tumbleweed
< 8.21.0-r0+ 11 more
- (no CPE)range: < 8.21.0-r0
- (no CPE)range: < 8.21.0-r0
- (no CPE)range: < 8.21.0-r0
- (no CPE)range: < 8.21.0-r0
- (no CPE)range: < 8.21.0-r0
- (no CPE)range: < 8.21.0-r0
- (no CPE)range: < 8.21.0-r0
- (no CPE)range: < 8.21.0-r0
- (no CPE)range: < 8.21.0-r0
- (no CPE)range: < 8.21.0-r0
- (no CPE)range: < 8.14.1-160000.8.1
- (no CPE)range: < 8.21.0-1.1
Patches
Vulnerability mechanics
References
3- curl.se/docs/CVE-2026-8286.htmlnvdPatchVendor Advisory
- hackerone.com/reports/3718195nvdExploitIssue TrackingThird Party Advisory
- curl.se/docs/CVE-2026-8286.jsonnvdVendor Advisory
News mentions
1- 25-Year-Old Vulnerability in cURL Used by 30 Billion Devices Finally PatchedCyber Security News · Jun 25, 2026