PyPI/pyasn1 CVE-2026-59884: high 7.5, EPSS 0.62%
pyasn1 BER/CER/DER decoder denial of service via unbounded long-form tag IDs
Action: Upgrade pyasn1 to 0.6.4 or later.
pip install pyasn1==0.6.4Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 0.6.4 | - |
Fixed versions
| 0.6.4 |
Sources
- osv: GHSA-m4p7-r5rc-7g4j
- https://github.com/pyasn1/pyasn1/security/advisories/GHSA-m4p7-r5rc-7g4j
- https://nvd.nist.gov/vuln/detail/CVE-2026-59884
- https://github.com/pyasn1/pyasn1/commit/628e36ecbb5277a3f01572ce418ef54271b165a5
- https://github.com/pyasn1/pyasn1
- https://github.com/pyasn1/pyasn1/releases/tag/v0.6.4
- https://github.com/pypa/advisory-database/tree/main/vulns/pyasn1/PYSEC-2026-3455.yaml
CVE-2026-59884 · published · modified · JSON