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CVE-2026-119197 pyasn1 is a generic ASN.1 library for Python
Description
pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.5, binary REAL decoding builds a large mantissa one octet at a time by shifting a growing integer and slicing the remaining byte string. Attacker-controlled ASN.1 includes a binary-encoded REAL with a large mantissa and reaches BER, CER, or DER decode(), with or without a schema containing REAL. RealPayloadDecoder.valueDecoder repeatedly performs a left shift, OR, and suffix copy for every mantissa octet, making decode time quadratic in mantissa length. A comparatively small REAL value can hold a decoding worker on one CPU core for seconds or longer and cause availability loss. This issue is fixed in version 0.6.5.
Produits et versions touchés
| Produit | Versions touchées | Corrigé en |
|---|---|---|
| pyasn1 0.6 | premières → < 0.6.5 | 0.6.5 |
Références
- github.com github.com
- github.com github.com
- github.com github.com
- github.com github.com
Chronologie
- Publiée
- Dernière modification
Autres CVE de pyasn1
Les 9 CVE de pyasn1 →
CVE-2026-119196
pyasn1: Quadratic CPU consumption in constructed BIT STRING decoding
7.5
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CVE-2026-119195
pyasn1 is a generic ASN.1 library for Python
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CVE-2026-119194
pyasn1 is a generic ASN.1 library for Python
7.5
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CVE-2026-59884
pyasn1 is a generic ASN.1 library for Python
7.5
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