VulnSocial

CVE-2026-5321Disclosure

LOWCVSS 2.1 · LOW

Signal is active with 2 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

A flaw has been found in vanna-ai vanna up to 2.0.2. Affected by this issue is some unknown functionality of the component FastAPI/Flask Server. Executing a manipulation can lead to permissive cross-domain policy with untrusted domains. The attack can be launched remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

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0.0/ 10 priority

Sources & remediation

Other references
Weakness type (CWE)
CWE-346CWE-942

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

  • 2 mentions across 1 observed day

What's happening

  • Technical details provided in 1 signal
  • Disclosure: 1 classified signal
  • General: 1 classified signal
  • 2 total mentions across 1 day

Deep dive

Activity timeline2 mentions / 1d
01122Mentions · 2026-04-02: 2Technical Details · 2026-04-02: 104-02
Signal classification2 categories
Disclosure
150.0%
General
150.0%
Referenced assets2 URLs
By indicator
Full discourse2 posts
  • CVE@CVEnew
    General

    CVE-2026-5321 A flaw has been found in vanna-ai vanna up to 2.0.2. Affected by this issue is some unknown functionality of the component FastAPI/Flask Server. Executing a manipulatio… https://www.cve.org/CVERecord?id=CVE-2026-5321

    Post summary

    A new CVE (CVE-2026-5321) is reported for vanna-ai vanna up to 2.0.2, affecting the FastAPI/Flask server component, but the post provides no further technical details, exploit evidence, or mitigation information.

    0000099
    56.9K followersView on X
  • CyberDudeBivash® | Global Cybersecurity Company@cyberbivash
    Disclosure

    🚨 CYBERDUDEBIVASH SENTINEL APEX ALERT 🚨 Threat: CVE-2026-5321 - vanna-ai vanna FastAPI/Flask Server cross-domain policy Intel Report: https://ift.tt/MhdBt0S

    Post summary

    Alert indicates the discovery of CVE-2026-5321 affecting vanna‑ai's FastAPI/Flask server, highlighting a cross‑domain policy flaw.

    00000501
    281 followersView on X

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