VulnSocial

CVE-2026-59884Patch(pyasn1 / pyasn1)

LOWCVSS 7.5 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch pyasn1 pyasn1 systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.4, the BER decoder shared by the CER and DER codecs parses long-form tags by accumulating continuation octets without an upper bound on the tag ID size, allowing a crafted input to force construction of an arbitrarily large integer with CPU cost growing quadratically and to trigger unhandled ValueError exceptions in Python 3.11+ error formatting paths. Any application decoding untrusted BER, CER, or DER input is affected. This issue is fixed in version 0.6.4.

pyasn1 CVEsBack to dashboard
0.5/ 10 priority

Sources & remediation

Patch / fix
Vendor / third-party advisories
Other references
Weakness type (CWE)
CWE-400

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • pyasn1

Threat summary

  • Patch or workaround signal is available
  • 1 mentions across 1 observed day

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 1 signal
  • 1 total mentions across 1 day

Affected systems

Vendors
pyasn1
Products
pyasn1

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-07-20: 1Patch / Workaround · 2026-07-20: 1Technical Details · 2026-07-20: 107-20
Signal classification1 categories
Patch
1100.0%
Referenced assets1 URL
By indicator
Full discourse1 post
  • VulniPulse@vulnipulse
    Patch

    ⚠️ Linux Red Hat Hardened Images alert: CVE-2026-59884 (CVSS 5.9) Remote attackers could disrupt service or cause a denial of service. Upgrade to a vendor-listed fixed release. https://vulnipulse.com/advisories/linux-cve-2026-59884 #Linux #RedHatHardenedImages #CyberSecurity #CVE

    Post summary

    The notice announces a CVE-2026-59884 denial‑of‑service vulnerability affecting Red Hat Hardened Images and recommends upgrading to a vendor-patched release.

    0000038
    6 followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Apppyasn1pyasn1-python-

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