CVE-2026-30922

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Source
https://cve.org/CVERecord?id=CVE-2026-30922
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-30922.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-30922
Aliases
Downstream
Related
Published
2026-03-18T02:29:45.857Z
Modified
2026-04-06T17:59:11.489397923Z
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 Vulnerable to Denial of Service via Unbounded Recursion
Details

pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.3, the pyasn1 library is vulnerable to a Denial of Service (DoS) attack caused by uncontrolled recursion when decoding ASN.1 data with deeply nested structures. An attacker can supply a crafted payload containing thousands of nested SEQUENCE (0x30) or SET (0x31) tags with "Indefinite Length" (0x80) markers. This forces the decoder to recursively call itself until the Python interpreter crashes with a RecursionError or consumes all available memory (OOM), crashing the host application. This is a distinct vulnerability from CVE-2026-23490 (which addressed integer overflows in OID decoding). The fix for CVE-2026-23490 (MAX_OID_ARC_CONTINUATION_OCTETS) does not mitigate this recursion issue. Version 0.6.3 fixes this specific issue.

Database specific 
{
    "cwe_ids": [
        "CWE-674"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30922.json",
    "cna_assigner": "GitHub_M"
}
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
af65c3b92e9deeae50db4de390982dd970d87f98

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

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-30922.json"