Metrics
Affected Vendors & Products
Sat, 21 Mar 2026 05:30:00 +0000
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| References |
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Fri, 20 Mar 2026 18:00:00 +0000
| Type | Values Removed | Values Added |
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| CPEs | cpe:2.3:a:pyasn1:pyasn1:*:*:*:*:*:python:*:* |
Thu, 19 Mar 2026 00:15:00 +0000
| Type | Values Removed | Values Added |
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| Weaknesses | CWE-835 | |
| References |
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| Metrics |
threat_severity
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cvssV3_0
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Wed, 18 Mar 2026 21:15:00 +0000
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| Metrics |
ssvc
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Wed, 18 Mar 2026 12:15:00 +0000
| Type | Values Removed | Values Added |
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| First Time appeared |
Pyasn1
Pyasn1 pyasn1 |
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| Vendors & Products |
Pyasn1
Pyasn1 pyasn1 |
Wed, 18 Mar 2026 03:30:00 +0000
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| Description | 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. | |
| Title | pyasn1 Vulnerable to Denial of Service via Unbounded Recursion | |
| Weaknesses | CWE-674 | |
| References |
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| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-03-18T02:29:45.857Z
Updated: 2026-03-21T00:16:47.028Z
Reserved: 2026-03-07T16:40:05.884Z
Link: CVE-2026-30922
Updated: 2026-03-21T00:16:47.028Z
Status : Modified
Published: 2026-03-18T04:17:18.397
Modified: 2026-03-21T01:17:06.360
Link: CVE-2026-30922