Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Affects Red HatSource GCVE Database
Not known to be exploited · CVSS 8.7 High : upgrade Red Hat to 1.20.2 soon.
Data as of 30 Oct 2026, 00:00 UTC
Thin evidence
One scorer or none| CNA (GitHub_M) | CVSS 4.0 | 8.7 |
|---|
- Patch
- Available – fixed in 1.20.2
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 26 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
Upgrade compress to 1.20.2.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| klauspostcompress | Affected
| Fixed in
|
AI-suggested
Apply the updated Red Hat Hardened Images RPMs that include the fixed opentelemetry-collector-k8s package version 0.163.2-0.1.hum1. Additionally, reject or filter untrusted Zstandard compressed payloads at ingress proxies or restrict decompression endpoints to authenticated, trusted clients. There is no direct configuration-level workaround within the library itself.
Description
A vulnerability in the klauspost compress library's Zstandard (zstd) decompression implementation allows a remote attacker to cause a denial of service (DoS) by submitting a specially crafted compressed stream. The flaw is due to an integer handling error that leads to an out-of-bounds read and an unhandled panic, crashing the application. This affects applications that decompress untrusted inputs using the vulnerable library. The issue is addressed in updated Red Hat Hardened Images RPMs containing a fixed version of the opentelemetry-collector-k8s package.
References
- access.redhat.com/errata/RHSA-2026:88185 (opens in a new tab)
- images.redhat.com (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-116591 (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_88185.json (opens in a new tab)