CVE-2026-5119: Red Hat Enterprise Linux 10 · Cleartext Transmission
Affects Red Hat Enterprise Linux 10Source CVE Database V5
Not known to be exploited · CVSS 5.9 Medium.
Data as of 30 Oct 2026, 06:59 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 17% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 30 Mar 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10libsoup3 | Affected– | Fixed in– |
| Red Hat Enterprise Linux 10libsoup3 | Affected– | Fixed in– |
| Red Hat Enterprise Linux 10.0 Extended Update Supportlibsoup3 | Affected– | Fixed in– |
| Red Hat Enterprise Linux 7 Extended Lifecycle Supportlibsoup | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8libsoup | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8libsoup | Affected– | Fixed in– |
AI-suggested
Red Hat has released official security updates for libsoup in Red Hat Enterprise Linux 8 and 9 that address CVE-2026-5119. Users should apply the provided patches as detailed in Red Hat advisories RHSA-2026:13978 (RHEL 9) and RHSA-2026:14087 (RHEL 8). Instructions for applying these updates are available at https://access.redhat.com/articles/11258. No additional mitigation steps are indicated by the vendor advisory.
Description
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.
References
- access.redhat.com/errata/RHSA-2026:13978 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:14087 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:15968 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:17482 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:19143 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:19356 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:21686 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:22316 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:22317 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:22323 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:22710 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:22716 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:24344 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:24722 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-5119 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2452932 (opens in a new tab)
- gitlab.gnome.org/GNOME/libsoup/-/issues/502 (opens in a new tab)