CVE-2026-23490
pyasn1 has a DoS vulnerability in decoder
HIGH
7.5
CVSS Score
Published: January 16, 2026 at 07:03 PM UTC
Updated: September 9, 2026 at 01:18 PM UTC
12 products affected across 3 vendorsDebian LinuxPYASN1OpenShift Container Platform
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Severity
HIGH7.5
Exploit prediction
EPSS 0.8%
SSVC
PoC
Description
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Debian Linux· Debiandrupal
95%v < 0.6.2
Affected range stops below 0.6.2, so it looks safe — our inference, not a vendor statement
AI Inference Server· Red Hatcontainer
60%All versions
Vendor states this is fixed in 1782353093 (unaffected)
Vendor states this is fixed in 0:0.6.3-1.el8ap (unaffected)
Vendor states this is fixed in 0:0.6.3-1.el9ap (unaffected)
Vendor states this is fixed in 0:4.6.26-1.el8ap (unaffected)
Vendor states this is fixed in 0:4.6.26-1.el9ap (unaffected)
Vendor states this is fixed in 0:4.7.9-1.el9ap (unaffected)
Vendor states this is fixed in 1777296732 (unaffected)
Vendor states this is fixed in 1777391447 (unaffected)
Vendor states this is fixed in 1777398315 (unaffected)
Vendor states this is fixed in 1777402264 (unaffected)
Vendor states this is fixed in 1780102732 (unaffected)
Vendor states this is fixed in 2 (unaffected)
60%
All versions
All versions
OpenShift AI· Red Hatcontainer
60%All versions
Vendor states this is fixed in 1778239104 (unaffected)
Vendor states this is fixed in 1778263407 (unaffected)
Vendor states this is fixed in 1778791600 (unaffected)
Vendor states this is fixed in 1779123334 (unaffected)
Vendor states this is fixed in 1780069127 (unaffected)
Vendor states this is fixed in 1780069135 (unaffected)
Vendor states this is fixed in 1782471587 (unaffected)
Vendor states this is fixed in 1782471606 (unaffected)
Vendor states this is fixed in 1782471661 (unaffected)
Vendor states this is fixed in 1782471672 (unaffected)
Vendor states this is fixed in 1782471678 (unaffected)
Vendor states this is fixed in 1782471697 (unaffected)
Vendor states this is fixed in 1782471730 (unaffected)
Vendor states this is fixed in 1782471731 (unaffected)
Vendor states this is fixed in 1782471732 (unaffected)
Vendor states this is fixed in 1782471734 (unaffected)
Vendor states this is fixed in 1782471740 (unaffected)
Vendor states this is fixed in 1782471753 (unaffected)
Vendor states this is fixed in 1782471796 (unaffected)
Vendor states this is fixed in 1782471834 (unaffected)
Vendor states this is fixed in 1782471835 (unaffected)
Vendor states this is fixed in 1782471849 (unaffected)
Vendor states this is fixed in 1782471879 (unaffected)
Vendor states this is fixed in 1782471929 (unaffected)
Vendor states this is fixed in 1782472374 (unaffected)
Vendor states this is fixed in 1783615165 (unaffected)
Vendor states this is fixed in 1783615385 (unaffected)
Vendor states this is fixed in 1783615414 (unaffected)
Vendor states this is fixed in 1783615432 (unaffected)
Vendor states this is fixed in 1783616068 (unaffected)
Vendor states this is fixed in 1783664711 (unaffected)
Vendor states this is fixed in 1783664921 (unaffected)
Vendor states this is fixed in 1783664922 (unaffected)
Vendor states this is fixed in 1783696506 (unaffected)
Vendor states this is fixed in 1783696507 (unaffected)
Vendor states this is fixed in 1783696510 (unaffected)
Vendor states this is fixed in 1783696512 (unaffected)
Vendor states this is fixed in 1783998551 (unaffected)
Vendor states this is fixed in 1783998585 (unaffected)
60%
Vendor states this is fixed in 0:0.5.1-4.el9 (unaffected)
All versions
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (60)
x_refsource_CONFIRMVendor Advisory
Source: cverecord
https://github.com/pyasn1/pyasn1/security/advisories/GHSA-63vm-454h-vhhqx_refsource_MISCPatch
Source: cverecord
https://github.com/pyasn1/pyasn1/commit/3908f144229eed4df24bd569d16e5991ace44970x_refsource_MISCProductRelease Notes
Source: cverecord
https://github.com/pyasn1/pyasn1/releases/tag/v0.6.2Vendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.debian.org/debian-lts-announce/2026/02/msg00002.htmlSource: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/errata/RHSA-2026:13508Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/errata/RHSA-2026:13512Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/errata/RHSA-2026:13545Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/errata/RHSA-2026:13553SSVC — Action Prioritization
SSVCPoCAutomatablePartial impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
7.5HIGHGitHub_M
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-770
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