VulnSocial

CVE-2026-66339Disclosure(gnome / enterprise_linux)

LOWCVSS 6.5 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD 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.

gnome CVEsBack to dashboard
0.5/ 10 priority

Sources & remediation

Exploit / PoC references
Vendor / third-party advisories
Weakness type (CWE)
CWE-201

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

NONE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • enterprise_linux
  • libsoup

Threat summary

  • 3 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Technical details provided in 3 signals
  • Disclosure: 3 classified signals
  • Peaked 1d ago at 2 mentions (2026-07-25); latest day: 1
  • 3 total mentions across 2 days

Affected systems

Vendors
gnomeredhat
Products
enterprise_linuxlibsoup

6 versions affected across 2 products

Deep dive

Activity timeline3 mentions / 2d
01122Mentions · 2026-07-25: 2Mentions · 2026-07-29: 1Technical Details · 2026-07-25: 2Technical Details · 2026-07-29: 107-2507-29
Signal classification1 categories
Disclosure
3100.0%
Referenced assets3 URLs
Classification over time
DateTotalLabels
2026-07-252
Disclosure2
2026-07-291
Disclosure1
Full discourse3 posts
  • CVE@CVEnew
    Disclosure

    CVE-2026-66339 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 HT… https://www.cve.org/CVERecord?id=CVE-2026-66339

    Post summary

    The text announces CVE-2026-66339, a libsoup flaw involving improper handling of Proxy-Authorization headers over CONNECT tunnels; no PoC, exploit, or patch details are provided.

    000101.0K
    57.9K followersView on X
  • Israel@f1tym1
    Disclosure

    CVE-2026-66339: Proxy Credentials Leak in Red Hat Enterprise Linux. https://ift.tt/I82cSD9

    Post summary

    The snippet announces CVE‑2026‑66339, a proxy credentials leak affecting Red Hat Enterprise Linux, without mentioning exploitation, patches, or a PoC.

    0000041
    1.0K followersView on X
  • Infoflowcloud@infoflowcloud
    Disclosure

    🚨*CVE* CVE-2026-66339 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 HT… https://www.cve.org/CVERecord?id=CVE-2026-66339 ----- Traducción: Se encontró una vu… http://infoflow.cloud`

    Post summary

    The tweet announces the discovery of CVE-2026‑66339 in libsoup, detailing improper handling of Proxy‑Authorization headers over CONNECT tunnels, and links to the official CVE record, without any evidence of exploitation or patches.

    0000032
    95 followersView on X
CPE platform detail6 entries

6 of 6 entries

PartVendorProductVersionTarget SWTarget HW
Appgnomelibsoup---
OSredhatenterprise_linux10.0--
OSredhatenterprise_linux6.0--
OSredhatenterprise_linux7.0--
OSredhatenterprise_linux8.0--
OSredhatenterprise_linux9.0--

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