Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Affects Red Hat textSource GCVE Database
Not known to be exploited · CVSS 7.5 High.
Data as of 30 Oct 2026, 07:50 UTC
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 7 Oct 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 |
|---|---|---|
Gogolang.org/x/textpkg:golang/golang.org/x/textOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fix is available via updated Red Hat Hardened Images RPMs, including opentelemetry-collector-0.162.0-0.1.hum1 packages. Users should apply these updates as per Red Hat's advisory instructions. Applications that do not use the Nickname profile or allocate appropriately sized buffers are not vulnerable. No additional mitigations are specified.
Description
CVE-2026-56851 is a denial of service vulnerability in the golang.org/x/text library's Nickname profile. An attacker can cause an application panic and crash by submitting specially crafted input that triggers an out-of-bounds slice indexing error when transforming text into an undersized buffer. This affects applications using the Nickname profile for string normalization or validation with small memory buffers. The vulnerability has been rated as important severity due to the potential for remote unauthenticated attackers to cause service disruption.
References
- access.redhat.com/errata/RHSA-2026:73524 (opens in a new tab)
- images.redhat.com (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-56851 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_73524.json (opens in a new tab)