VulnSocial

CVE-2026-47086Active Exploitation

LOWCVSS 3.5 · LOW

Exploitation ongoing with high activity in latest observed window (1 mentions)

Immediate actions

  • Prioritize remediation for affected systems immediately
  • Assume compromise if assets are exposed
  • Track advisory updates for patch or workaround availability

Recommended action window: Immediate (within 24h)

NVD description

An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. GENURLAUTH-issued tokens can bypass ACLs. Any authenticated user could mint a URLAUTH token (via the GENURLAUTH command) for any mailbox they could name, even without read access on it. This would allow reading mail from mailboxes despite having no granted permissions.

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3.5/ 10 priority

Sources & remediation

Other references
Weakness type (CWE)
CWE-863

Priority

LOW

Exploitation

ACTIVE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

  • Active exploitation appears in 1 classified signals
  • 1 mentions across 1 observed day

What's happening

  • Active exploitation reported across 1 signal
  • 1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-07-17: 1Active Exploitation · 2026-07-17: 107-17
Signal classification1 categories
Active Exploitation
1100.0%
Referenced assets1 URL
By indicator
Full discourse1 post
  • VulDB 🛡@vuldb
    Active Exploitation

    Attention, elevated activities detected targeting cyrusimap Cyrus IMAP (CVE-2026-47086) https://vuldb.com/vuln/379618/cti

    Post summary

    The post signals that elevated activities, implying active exploitation, have been detected against Cyrus IMAP's CVE‑2026‑47086, yet it offers no technical or mitigation details.

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    2.3K followersView on X

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