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VulnerabilityPublished Updated

CVE-2026-5119: Red Hat Enterprise Linux 10 · Cleartext Transmission

Affects Red Hat Enterprise Linux 10Source CVE Database V5

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Not known to be exploited · CVSS 5.9 Medium.

Data as of 30 Oct 2026, 06:59 UTC

CVSS 3.1 base score
5.9Medium
How severe the flaw is on the 0–10 CVSS scale.
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:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 30 Mar 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

ProductAffectedFixed in
Red Hat Enterprise Linux 10libsoup3Affected–Fixed in–
Red Hat Enterprise Linux 10libsoup3Affected–Fixed in–
Red Hat Enterprise Linux 10.0 Extended Update Supportlibsoup3Affected–Fixed in–
Red Hat Enterprise Linux 7 Extended Lifecycle SupportlibsoupAffected–Fixed in–
Red Hat Enterprise Linux 8libsoupAffected–Fixed in–
Red Hat Enterprise Linux 8libsoupAffected–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

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