CVE-2026-5119

Summary

A flaw was found in libsoup. When establishing HTTPS tunnels through a configured HTTP proxy, sensitive session cookies are transmitted in cleartext within the initial HTTP CONNECT request. A network-positioned attacker or a malicious HTTP proxy can intercept these cookies, leading to potential session hijacking or user impersonation.

Affected Software

VendorProductVersion RangeStatus
Red HatRed Hat Enterprise Linux 100:3.6.5-3.el10_1.11 < *unaffected
Red HatRed Hat Enterprise Linux 100:3.6.5-3.el10_2.11 < *unaffected
Red HatRed Hat Enterprise Linux 10.0 Extended Update Support0:3.6.5-3.el10_0.15 < *unaffected
Red HatRed Hat Enterprise Linux 7 Extended Lifecycle Support0:2.62.2-12.el7_9 < *unaffected
Red HatRed Hat Enterprise Linux 80:2.62.3-14.el8_10 < *unaffected
Red HatRed Hat Enterprise Linux 80:2.62.3-14.el8_10 < *unaffected
Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support0:2.62.3-2.el8_4.9 < *unaffected
Red HatRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On0:2.62.3-2.el8_4.9 < *unaffected
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support0:2.62.3-2.el8_6.9 < *unaffected
Red HatRed Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On0:2.62.3-2.el8_6.9 < *unaffected
Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update Service0:2.62.3-3.el8_8.9 < *unaffected
Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP Solutions0:2.62.3-3.el8_8.9 < *unaffected
Red HatRed Hat Enterprise Linux 90:2.72.0-12.el9_7.6 < *unaffected
Red HatRed Hat Enterprise Linux 90:2.72.0-16.el9_8.1 < *unaffected
Red HatRed Hat Enterprise Linux 9.0 Update Services for SAP Solutions0:2.72.0-8.el9_0.10 < *unaffected
Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP Solutions0:2.72.0-8.el9_2.11 < *unaffected
Red HatRed Hat Enterprise Linux 9.4 Update Services for SAP Solutions0:2.72.0-8.el9_4.10 < *unaffected
Red HatRed Hat Enterprise Linux 9.6 Extended Update Support0:2.72.0-10.el9_6.7 < *unaffected

Weaknesses

  • CWE-319: Cleartext Transmission of Sensitive Information

Workarounds

To mitigate this issue, ensure that all HTTP proxies used for HTTPS tunnels are trusted and operate within a secure network. Avoid configuring applications to use untrusted HTTP proxies. If feasible, configure applications to bypass proxies for sensitive connections or utilize a secure proxy solution that encrypts the entire communication channel. A service restart or application reload may be required for changes to take effect.

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References