CVE-2026-30922

pyasn1

TLP:CLEAR

csirt@kutim:~/threat-intel/cve/CVE-2026-30922

Katalog CVE

CVSS 7.5 · High EPSS 0,93%

Kerentanan Uncontrolled Recursion pada pyasn1. Skor CVSS 3.1 7.5 (High) menurut github.com.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD
18 Maret 2026
Terakhir diubah
10 September 2026
Status NVD
Modified
CVSS 3.1
7.5 (High), sumber github.com
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H · uraikan di kalkulator
Jenis kelemahan (CWE)
CWE-674: Uncontrolled Recursion
CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')
EPSS (30 hari)
0,93% peluang dieksploitasi; lebih tinggi dari 59,6% CVE lain

Produk dan versi terdampak

VendorProdukVersi terdampak
pyasn1 pyasn1 Semua versi sebelum 0.6.3

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

Sumber: NVD · CVE.org · EPSS. Halaman ini disusun otomatis dari data tersebut; pembaruan terakhir 5 Okt 2026, 20:11 WITA. Kalau sistem di Perangkat Daerah memakai produk ini dan butuh bantuan, laporkan lewat kanal pelaporan.