CVE-2026-59885

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Source
https://cve.org/CVERecord?id=CVE-2026-59885
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-59885.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-59885
Aliases
Downstream
Related
Published
2026-07-14T16:40:00.515Z
Modified
2026-08-12T18:48:01.607685014Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
pyasn1: Quadratic complexity in OBJECT IDENTIFIER and RELATIVE-OID processing allows denial of service
Details

pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.4, the BER, CER, and DER decoders process OBJECT IDENTIFIER and RELATIVE-OID values in quadratic time relative to the number of arcs, so a small crafted payload containing an OID with many arcs consumes excessive CPU per decode() call and can deny service to applications that decode untrusted ASN.1 data. The corresponding encoders have the same quadratic behavior when an application re-encodes previously decoded attacker-supplied values. This issue is fixed in version 0.6.4.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-400",
        "CWE-407"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59885.json"
}
References

Affected packages

Git / github.com/pyasn1/pyasn1

Affected ranges

Type
GIT
Repo
https://github.com/pyasn1/pyasn1
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
72e4803405816c371ed3b2cb4be181c47f038406
Fixed
45bdb19eb7df4b3780fe9c912c63e99bffc39dd9
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.6.4"
        }
    ],
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ],
    "cpe": "cpe:2.3:a:pyasn1:pyasn1:*:*:*:*:*:python:*:*"
}

Affected versions

0.*
0.2.3
v0.*
v0.2.1
v0.2.2
v0.3.1
v0.3.2
v0.3.3
v0.3.4
v0.3.5
v0.3.6
v0.3.7
v0.4.1
v0.4.2
v0.4.3
v0.4.4
v0.4.5
v0.4.6
v0.4.7
v0.4.8
v0.5.0
v0.5.1
v0.6.0
v0.6.1
v0.6.2
v0.6.3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-59885.json"