Red Hat Security Advisory: python-pyasn1 security update
Affects Red Hat python-pyasn1Source GCVE Database
Not known to be exploited.
Data as of 30 Oct 2026, 11:52 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.6% chance of exploitation in 30 days – higher than 49% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 25 Aug 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 30 Oct 2026.
What to do
AI-suggested
Red Hat has released updated python-pyasn1 packages (version 0.4.8-6.el9_6.2) for Red Hat Enterprise Linux 9.6 Extended Update Support and related variants. Users should apply these official updates to remediate the vulnerability. Refer to the Red Hat advisory and article https://access.redhat.com/articles/11258 for detailed update instructions. No additional mitigation is required beyond applying the vendor-provided patch.
Description
A denial of service vulnerability (CVE-2026-59886) exists in the python-pyasn1 library due to crafted ASN.1 REAL values. This issue affects Red Hat Enterprise Linux 9.6 Extended Update Support and related variants. The vulnerability allows an attacker to cause a denial of service condition by exploiting the way pyasn1 handles certain ASN.1 REAL values. Red Hat has released updated python-pyasn1 packages to address this issue.