Bumps pyasn1 from 0.6.3 to 0.6.4.

Release notes

Sourced from pyasn1's releases.

Release 0.6.4

This is a security release.

• CVE-2026-59885 (GHSA-8ppf-4f7h-5ppj): Fixed quadratic time complexity in the OBJECT IDENTIFIER and RELATIVE-OID decoders. A small crafted substrate encoding many arcs could consume excessive CPU.


• CVE-2026-59884 (GHSA-m4p7-r5rc-7g4j): Limited BER long-form tag IDs to 20 octets (140 bits). Unbounded tag IDs allowed a crafted substrate to consume excessive CPU and memory.


• CVE-2026-59886 (GHSA-hm4w-wwcw-mr6r): Fixed excessive memory and CPU consumption in Real.float() for values with large base-10 exponents.


• Pinned PyPI publish GitHub Action to an immutable commit.

All changes are noted in the CHANGELOG.

Changelog

Sourced from pyasn1's changelog.

Revision 0.6.4, released 08-07-2026

• CVE-2026-59885 (GHSA-8ppf-4f7h-5ppj): Fixed quadratic time
  complexity in the OBJECT IDENTIFIER and RELATIVE-OID decoders.
  A small crafted substrate encoding many arcs could consume
  excessive CPU. Arcs are now accumulated in linear time; decoded
  values are unchanged (thanks for reporting, tynus2)


• CVE-2026-59884 (GHSA-m4p7-r5rc-7g4j): Limited BER long-form tag
  IDs to 20 octets (140 bits), matching the OID arc limit introduced
  in 0.6.2. Unbounded tag IDs allowed a crafted substrate to consume
  excessive CPU and memory; longer tag IDs are now rejected with
  PyAsn1Error. Also fixed Tag and TagSet repr() failing on huge tag
  (thanks for reporting, mikeappsec)
  IDs due to the integer-to-string conversion limit (Python 3.11+)


• CVE-2026-59886 (GHSA-hm4w-wwcw-mr6r): Fixed excessive memory and
  CPU consumption in Real.float() for values with large base-10
  exponents. Conversion no longer materializes huge intermediate
  integers; values too large to represent as a Python float raise
  OverflowError promptly, and prettyPrint() renders them as
  '<!-- raw HTML omitted -->' as before. Also fixed base-10 mantissa normalization
  to use exact integer arithmetic; mantissas larger than 2**53
  could previously lose precision through float division
  (thanks for reporting, gvozdila)


• Pinned PyPI publish GitHub Action to an immutable commit
  [pr #113](pyasn1/pyasn1#113)

Commits

• 
  72e4803 Prepare release 0.6.4


• 
  0c19eeb Pin PyPI publish action to immutable commit (#113)


• 
  45bdb19 Merge commit from fork


• 
  628e36e Merge commit from fork


• 
  e60c691 Merge commit from fork


• See full diff in compare view
  

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