CVE•Published 2026-07-03•Modified 2026-09-15•1 article on news•5 live references•NVD data
CVE-2026-8927Haxx · Curl
Vulnerability data via NVD (ingested)
CVSS v3.1
9.1
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS percentile
41
Exploit Prediction Scoring System · top 59% of all CVEs
Weaknesses (CWE)
Description
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`.
Timeline
Published 2026-07-03
Modified 2026-09-15
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2026-8927Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Haxx Curl"All exposed Haxx Curl instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Curl"HTTP body or banner mentions "Curl" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-8927Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-8927Censys host search filtered to this CVE id.
grep.app
CVE-2026-8927Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-8927GitHub code search for direct mentions.
Google dork
"CVE-2026-8927" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub (3)
CVE-2026-89273 repos