CVE-2026-8469
Unauthenticated DoS via BEAM atom table exhaustion in phoenix_storybook <1.1.0.
Is CVE-2026-8469 being exploited?
Not confirmed. CVE-2026-8469 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.54% probability of exploitation in the next 30 days.
How severe is CVE-2026-8469?
CVE-2026-8469 is rated High with a CVSS score of 8.2. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-8469?
Yes. A fix has been recorded for CVE-2026-8469. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-8469 affect?
CVE-2026-8469 affects phoenix_storybook 0.2.0 - 1.0.x. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-8469?
Upgrade to phoenix_storybook 1.1.0+
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated DoS: attacker-controlled strings create permanent BEAM atoms, exhausting the atom table and crashing the BEAM node.
Immediate action required
- affected>= 0.2.0 and < 1.1.0
- affected>= 0228669d55c23a754d1ef11f49a32121129d5395 and < 96d524690af0fe197a49f60d18e564a620b9ef81
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.