CVE-2026-48853 (GCVE-0-2026-48853)
Vulnerability from cvelistv5 – Published: 2026-06-15 21:56 – Updated: 2026-06-16 14:45
VLAI
Title
Remote code execution and denial of service via unsafe Erlang term deserialization in elixir-grpc/grpc
Summary
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.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/elixir-grpc/grpc/security/advi… | vendor-advisoryrelated |
| https://cna.erlef.org/cves/CVE-2026-48853.html | related |
| https://osv.dev/vulnerability/EEF-CVE-2026-48853 | related |
| https://github.com/elixir-grpc/grpc/commit/272a97… | patch |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| elixir-grpc | grpc |
Affected:
0.4.0 , < 1.0.0
(semver)
cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:* |
|
| elixir-grpc | grpc |
Affected:
25bcc569fe2cc4478531a6c546c923205fc751c9 , < 272a97a5ea1b46af1819f14a831fcf35fc91f992
(git)
cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:* |
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}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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