[dependabot]

Bumps pyasn1 from 0.6.3 to 0.6.5.

Release notes

Sourced from pyasn1's releases.

Release 0.6.5

Revision 0.6.5, released 26-10-2026

• GHSA-mm57-4v3p-rchx: Decoded binary REAL mantissas in linear time instead of repeatedly shifting a growing integer and slicing the remaining bytes (thanks for reporting, manus-use, manus-pi, ucsurf, adriank31)
• GHSA-2qm8-x737-gmw5: Reassembled constructed BIT STRING fragments in linear time while preserving their decoded bit values, including intermediate fragment padding (thanks for reporting, manus-use)
• GHSA-9m75-vc3g-4x39: Reassembled constructed OCTET STRING and character-string fragments and indefinite-length ANY content in linear time. Nested constructed OCTET STRING fragments now contribute their decoded octets (thanks for reporting, alimony, manus-pi, adriank31)
• GHSA-fm9c-5rcf-2q5p: Bounded schemaless container type tracking after two distinct tag sets to prevent quadratic CPU use from colliding long tag IDs (thanks for reporting, droideck)

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 0.6.5, released 26-10-2026

• GHSA-mm57-4v3p-rchx: Decoded binary REAL mantissas in linear time instead of repeatedly shifting a growing integer and slicing the remaining bytes (thanks for reporting, manus-use, manus-pi, ucsurf, adriank31)
• GHSA-2qm8-x737-gmw5: Reassembled constructed BIT STRING fragments in linear time while preserving their decoded bit values, including intermediate fragment padding (thanks for reporting, manus-use)
• GHSA-9m75-vc3g-4x39: Reassembled constructed OCTET STRING and character-string fragments and indefinite-length ANY content in linear time. Nested constructed OCTET STRING fragments now contribute their decoded octets (thanks for reporting, alimony, manus-pi, adriank31)
• GHSA-fm9c-5rcf-2q5p: Bounded schemaless container type tracking after two distinct tag sets to prevent quadratic CPU use from colliding long tag IDs (thanks for reporting, droideck)

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 '' 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

• 5d16736 Prepare release 0.6.5
• a36e3a3 Fix quadratic CPU use in schemaless container decoding
• 4ce0079 Remove quadratic constructed OCTET STRING and ANY reassembly
• 73ba7b0 Remove quadratic constructed BIT STRING reassembly
• ce3ec33 Remove quadratic binary REAL mantissa decoding
• 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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Summary by cubic

Updates pyasn1 from 0.6.3 to 0.6.5 to resolve multiple CVEs and security advisories in the ASN.1 decoder. This is a security release; no API changes are expected.

• 0.6.4 fixes quadratic time complexity in OBJECT IDENTIFIER and RELATIVE-OID decoding, limits BER long-form tag IDs to 20 octets, and prevents excessive CPU and memory use in Real.__float__().
• 0.6.5 removes quadratic-time behavior in REAL mantissa decoding and constructed BIT STRING, OCTET STRING, and indefinite-length ANY reassembly.

^{Written for commit 1e34476. Summary will update on new commits.}

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[glebedel]

s2d2 Security Autopilot evidence, 2026-11-03

Bump: pyasn1 0.6.3 to 0.6.5 (runtime scope, patch update, security fix).
Verdict: SAFE on evidence, but on a trust-boundary edge without a covering test, so it needs a human look before merge.

• local: 871/871 pytest, ruff, ty same as main
• CI green on the current head (10 checks)
• Merge state: BLOCKED (a human approving review is required; s2d2 never approves PRs)

Posted by s2d2 Security Autopilot for Guillaume. Reply here if this is wrong.