Event Monitor Cyber
EM-20261104-1UKI VulnerabilityCritical severity

Critical activestorage Vulnerability (CVE-2026-122006)

CVE-2026-122006

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Status
Developing

Since : signals keep joining.

First Signal
Nov 04 14:12 UTCC41 Red Hat Security Data
Page Born
Nov 04 15:17 UTCsecond source joined
Last Signal
Nov 04 15:17 UTC25 hours before snapshot
Sources
21 official · 1 research, news or crowd
Open For
25 hoursso 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
    Nov 04 15:17 UTC
    C6 NVD published
  2. Scored: reached
    Nov 04 15:17 UTC
    CVSS 9.8 · EPSS 0.7%
  3. Exploited: not yet
    Not yet
    No exploitation reported
  4. Advisories: not yet
    Not yet
    None yet
  5. Vendor Response: reached
    Nov 04 14:12 UTC
    C41 published
  6. Resolved: not yet
    Not yet
    After 14 quiet days

Timeline

12:0018:00Nov 5BornC41 Red Hat Security DataC6 NVD CVE API 2.0

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

Signals

  1. CVE-2026-122006 (CVSS 9.8) (opens source in a new tab) The activestorage gem before 8.1.4.1 for Ruby on Rails, when ImageMagick attachment processing occurs, can allow server read and write operations (e.g., reading secret_key_base) because the ImageMagick analyzer runs when… Crit severityDatabaseC6 NVD CVE API 2.0
  2. Red Hat: CVE-2026-122006 (important) (opens source in a new tab) activestorage: activestorage: arbitrary file read and write via ImageMagick attachment analysis High severityVendorC41 Red Hat Security Data