Event Monitor Cyber
EM-20261030-U56W VulnerabilityHigh severity

pyasn1 Vulnerability (CVE-2026-119197)

CVE-2026-119197

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Status
Developing

Since : signals keep joining.

First Signal
Oct 29 20:17 UTCC6 NVD CVE API 2.0
Page Born
Oct 30 23:06 UTCsecond source joined
Last Signal
Oct 30 23:06 UTC5 days before snapshot
Sources
20 official · 2 research, news or crowd
Open For
6 daysso far

Life Of This Page

  1. 1
    Born
    A second, independent source names it.
  2. 2
    Developing · Now
    New signals join; severity can move.
  3. 3
    Confirmed
    Not yet
    CISA KEV lists it, or exploitation in the wild is reported.
  4. 4
    Resolved
    Not yet
    Past the fix deadline and 14 days with no new signal.
  5. 5
    Archived
    Not yet
    30 days after resolved. Read only; the link keeps working. Reopens if it comes back.

The ID never changes, and earlier addresses keep working. A correction is logged, never overwritten. If two pages turn out to be one incident, the later one points to the earlier.

Vulnerability Lifecycle

  1. Disclosed: reached
    Oct 29 20:17 UTC
    C6 NVD published
  2. Scored: reached
    Oct 29 20:17 UTC
    CVSS 7.5 · EPSS 0.4%
  3. Exploited: not yet
    Not yet
    No exploitation reported
  4. Advisories: not yet
    Not yet
    None yet
  5. Vendor Response: not yet
    Not yet
    None in sources yet
  6. Resolved: not yet
    Not yet
    After 14 quiet days

Timeline

18:00Oct 3006:0012:0018:00Oct 3106:00BornC6 NVD CVE API 2.0C26 GitHub Advisory Database

Point at a mark to read it. Squares are signals, colored by severity; every one is also listed under Signals.

Signals

  1. GHSA-mm57-4v3p-rchx / CVE-2026-119197: pyasn1 has quadratic-complexity denial of service in binary REAL decoding (opens source in a new tab) pip:pyasn1 High severityDatabaseC26 GitHub Advisory Database
  2. CVE-2026-119197 (CVSS 7.5) (opens source in a new tab) pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.5, binary REAL decoding builds a large mantissa one octet at a time by shifting a growing integer and slicing the remaining byte string. Attacker-controlled ASN.… High severityDatabaseC6 NVD CVE API 2.0