pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.2, a Denial-of-Service issue has been found that leads to memory exhaustion from malformed RELATIVE-OID with excessive continuation octets. This vulnerability is fixed in 0.6.2.
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This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.0%, top 90% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.2, a Denial-of-Service issue has been found that leads to memory exhaustion from malformed RELATIVE-OID with excessive continuation octets. This vulnerability is fixed in 0.6.2.
January 16, 2026
March 13, 2026
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Red Hat Security Advisory: RHOAI 3.3.3 - Red Hat OpenShift AI
Red Hat Security Advisory: OpenShift Container Platform 4.17.54 packages and security update
Red Hat Security Advisory: OpenShift Container Platform 4.18.42 packages and security update
Red Hat Security Advisory: Release of components for Service Telemetry Framework 1.5.7
Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.5 Container Release Update
Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.6 Container Release Update
Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.5 Product Security and Bug Fix Update
Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.6 Product Security and Bug Fix Update
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| pyasn1 | 0.6.1 | 0.6.2 | — |
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.
RHSA-2026:17611 — Important
RHSA-2026:1903 — Important
RHSA-2026:1904 — Important
RHSA-2026:1905 — Important
RHSA-2026:1906 — Important
RHSA-2026:2221 — Important
RHSA-2026:2299 — Important
RHSA-2026:2300 — Important
RHSA-2026:2302 — Important
RHSA-2026:2303 — Important
RHSA-2026:2309 — Important
RHSA-2026:2453 — Important
RHSA-2026:2460 — Important
RHSA-2026:2483 — Important
RHSA-2026:2486 — Important
RHSA-2026:2712 — Important
RHSA-2026:2758 — Important
Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-23490
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