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Affected Vendors & Products
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Solution
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Workaround
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Thu, 29 Oct 2026 21:30:00 +0000
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ssvc
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Thu, 29 Oct 2026 20:45:00 +0000
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Pyasn1
Pyasn1 pyasn1 |
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| Vendors & Products |
Pyasn1
Pyasn1 pyasn1 |
Thu, 29 Oct 2026 19:45:00 +0000
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| Description | pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.5, constructed string and indefinite-length ANY decoding repeatedly concatenates each fragment onto a growing bytes value. Attacker-controlled BER or CER data can use many constructed OCTET STRING or character-string fragments. DER rejects constructed OCTET STRING without a schema, but accepts its definite-length form when asn1Spec selects univ.OctetString; it also accepts constructed character strings such as UTF8String without a schema, even though those encodings are not valid DER. The separate indefinite-length ANY path is reachable in BER and CER when asn1Spec selects univ.Any; DER rejects indefinite lengths. OctetStringPayloadDecoder uses growing header concatenation and AnyPayloadDecoder.indefLenValueDecoder uses growing chunk concatenation, repeatedly copying an increasing prefix and causing quadratic work. A sufficiently fragmented value can occupy decoding workers and cause CPU exhaustion without confidentiality or integrity impact. This issue is fixed in version 0.6.5. | |
| Title | pyasn1: Quadratic-time denial of service in constructed string and indefinite-length ANY decoding | |
| Weaknesses | CWE-407 | |
| References |
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| Metrics |
cvssV3_1
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Projects
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-10-29T20:26:31.801Z
Reserved: 2026-10-29T16:04:48.728Z
Link: CVE-2026-119195
Updated: 2026-10-29T20:26:25.837Z
Status : Received
Published: 2026-10-29T20:17:30.633
Modified: 2026-10-29T21:17:18.553
Link: CVE-2026-119195
No data.
OpenCVE Enrichment
Updated: 2026-10-29T20:45:14Z