CVE-2026-53430
DoS in elixir-grpc via gzip decompression bomb
Is CVE-2026-53430 being exploited?
Not confirmed. CVE-2026-53430 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 0.35% probability of exploitation in the next 30 days.
How severe is CVE-2026-53430?
CVE-2026-53430 is rated High with a CVSS score of 8.7. 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-2026-53430?
Yes. A fix has been recorded for CVE-2026-53430. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-53430 affect?
CVE-2026-53430 affects elixir-grpc (grpc) library, versions 0.4.0 <= v < 1.0.0. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-53430?
Upgrade to elixir-grpc >= 1.0.0
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated attacker can exhaust BEAM heap via crafted gzip frame, causing OOM/crash; affects elixir-grpc < 1.0.0.
Patch when possible
- affected>= 0.4.0 and < 1.0.0
- affected>= beae6800fc8baf126f3fe7107d86a50e105275ba and < 1afbab9d57d2a3e16ca9c62ffa4923338ea96cfc
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.