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CVE

CVE-2026-48853

Remote code execution and denial of service via unsafe Erlang term deserialization in elixir-grpc/grpc
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CVE

CVE-2026-48853

Remote code execution and denial of service via unsafe Erlang term deserialization in elixir-grpc/grpc

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.binarytoterm/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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.2
-
4.0
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
C
H
U
0
-
C
H
U
-

Related Resources

No items found.

References

https://cna.erlef.org/cves/CVE-2026-48853.html, https://github.com, https://osv.dev/vulnerability/EEF-CVE-2026-48853, https://repo.hex.pm, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48853.json, https://github.com/elixir-grpc/grpc/security/advisories/GHSA-grp7-v8xh-rj7h, https://nvd.nist.gov/vuln/detail/CVE-2026-48853, https://github.com/elixir-grpc/grpc/commit/272a97a5ea1b46af1819f14a831fcf35fc91f992, https://github.com/elixir-grpc/grpc

Severity

0

CVSS Score
0
10

Basic Information

Base CVSS
0
EPSS Probability
0.00573%
EPSS Percentile
0.44961%
Introduced Version
e45282526107417bd54f57bb8298b52a7c272ccb,0
Fix Available
272a97a5ea1b46af1819f14a831fcf35fc91f992

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