---
cve: "CVE-2026-48853"
severity: "CRITICAL"
cvss: 9.2
epss: "57%"
vendor: "elixir-grpc"
kev: false
exploited: false
published: "2026-06-15 23:16:45"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-13T16:20:10+02:00"
---

# CVE-2026-48853

> 9.2 CRITICAL · 🧪 PoC

## Beschreibung

Deserialization of Untrusted Data and Allocation of Resources Without Limits or Throttling vulnerabilities in elixir-grpc grpc allow unauthenticated attackers to crash the BEAM node via atom table exhaustion and, when a decoded term flows into a call site that invokes it, achieve remote code execution on the server.

'Elixir.GRPC.Codec.Erlpack':decode/2 (lib/grpc/codec/erlpack.ex) calls :erlang.binary_to_term/1 on the raw gRPC message body without the :safe option, no size bound, and no type guard. Any unauthenticated peer that sends a request with Content-Type: application/grpc+erlpack can send a crafted payload that mints arbitrary new atoms (which are never garbage-collected, exhausting the bounded atom table and crashing the VM) or that encodes a fun term which, if applied anywhere downstream, executes attacker-controlled code inside the server process.

This issue affects grpc from 0.4.0 before 1.0.0.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 8105f803030f7f5ae1d722251ee6ab2e36878830 (Commit)
- 272a97a5ea1b46af1819f14a831fcf35fc91f992 (Commit)

## Referenzen

- <https://github.com/elixir-grpc/grpc/security/advisories/GHSA-grp7-v8xh-rj7h>
- <https://cna.erlef.org/cves/CVE-2026-48853.html>
- <https://osv.dev/vulnerability/EEF-CVE-2026-48853>
- <https://github.com/elixir-grpc/grpc/commit/272a97a5ea1b46af1819f14a831fcf35fc91f992>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-48853) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_