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stale SigV4 headers sent unintended

🗓️ 14 Oct 2026 08:00:00Reported by curlType 
curl
 curl
🔗 curl.se👁 9 Views

libcurl sends stale SigV4 headers on subsequent transfers after setting CURLOPT_AWS_SIGV4 to NULL.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
cve
CVE
CVE-2026-86409
14 Oct 202608:00
–cve
debiancve
Debian CVE
CVE-2026-86409
14 Oct 202608:00
–debiancve
hackerone
Hacker One
curl: CVE-2026-86409: stale SigV4 headers sent unintended
27 Aug 202609:03
–hackerone
osv
OSV
CURL-CVE-2026-86409 stale SigV4 headers sent unintended
14 Oct 202608:00
–osv
osv
OSV
DEBIAN-CVE-2026-86409
14 Oct 202607:47
–osv
osv
OSV
ECHO-B6FB-B123-10DB
14 Oct 202613:50
–osv
ubuntucve
UbuntuCve
CVE-2026-86409
14 Oct 202606:00
–ubuntucve
ubuntu
Ubuntu
USN-8927-1: curl vulnerabilities
14 Oct 202611:58
–ubuntu
Vulners
Node
OR
haxxcurlRange7.75.0–8.14.3
haxxlibcurlRange7.75.0–8.14.3
haxxcurlRange8.15.0–8.16.2
haxxlibcurlRange8.15.0–8.16.2
haxxcurlRange8.17.0–8.20.2
haxxlibcurlRange8.17.0–8.20.2
haxxcurlRange8.21.0–8.22.0
haxxlibcurlRange8.21.0–8.22.0

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17 Sep 2026 12:57Current
5.7Medium risk
Vulners AI Score5.7
9