CVE•Published 2026-07-24•Modified 2026-07-28•0 articles on news•4 live references•NVD data
CVE-2026-66339
Vulnerability data via NVD (ingested)
CVSS v3.1
6.5
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
EPSS percentile
14
Exploit Prediction Scoring System · top 86% of all CVEs
Weaknesses (CWE)
Description
A flaw was found in libsoup. After a CONNECT tunnel is established through an HTTP proxy, libsoup incorrectly attaches the Proxy-Authorization header to subsequent HTTPS requests sent through that tunnel to the destination server. This allows the destination server to capture proxy credentials, leading to information disclosure.
Timeline
Published 2026-07-24
Modified 2026-07-28
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).
More intel sources (5)
Shodan report
vuln:CVE-2026-66339Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-66339Censys host search filtered to this CVE id.
grep.app
CVE-2026-66339Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-66339GitHub code search for direct mentions.
Google dork
"CVE-2026-66339" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-66339 on GitHub.
We haven't classified any articles referencing CVE-2026-66339 yet. The external references above still apply.