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CVE-2026-13608VulnerabilityPublished Updated

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Affects Red HatSource GCVE Database

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Mentioned vulnerabilities

Not known to be exploited.

Data as of 29 Oct 2026, 18:38 UTC

Severity
Medium

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS
0.5% chance of exploitation in 30 days – higher than 42% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 3 Sep 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

AI-suggested

A fix is available in the updated Red Hat Hardened Images RPMs including curl-8.22.0-0.1.hum1 and related libcurl packages. Users should apply this update. Additionally, to mitigate the vulnerability, prevent connection reuse by setting CURLOPT_FORBID_REUSE for transfers using Negotiate authentication with empty credentials and isolate libcurl connection pools across different security principals. Enforcing network boundaries to limit outbound HTTP access can further reduce risk while patches are applied.

Description

A moderate security flaw was identified in libcurl used in Red Hat Hardened Images RPMs. The vulnerability allows information disclosure due to improper reuse of HTTP connections with Negotiate authentication when initial requests use empty credentials. This can lead to a subsequent user's request being sent over a previously authenticated connection, potentially exposing sensitive data. The issue specifically affects applications configured to use Negotiate authentication.

References

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