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.
SSVC
Exploitation: poc Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
  • CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
EEF
Impacted products
Vendor Product Version
elixir-grpc grpc Affected: 0.4.0 , < 1.0.0 (semver)
    cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:*
Create a notification for this product.
elixir-grpc grpc Affected: 25bcc569fe2cc4478531a6c546c923205fc751c9 , < 272a97a5ea1b46af1819f14a831fcf35fc91f992 (git)
    cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
Peter Ullrich Paulo Valente Jonatan Männchen
Show details on NVD website

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Any unauthenticated peer that sends a request with \u003ctt\u003eContent-Type: application/grpc+erlpack\u003c/tt\u003e 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.\u003c/p\u003e\u003cp\u003eThis issue affects grpc from 0.4.0 before 1.0.0.\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-502\", \"description\": \"CWE-502 Deserialization of Untrusted Data\"}, {\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-770\", \"description\": \"CWE-770 Allocation of Resources Without Limits or Throttling\"}]}], \"configurations\": [{\"lang\": \"en\", \"value\": \"GRPC.Codec.Erlpack must be explicitly registered as a codec on the gRPC server.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003ctt\u003eGRPC.Codec.Erlpack\u003c/tt\u003e must be explicitly registered as a codec on the gRPC server.\", \"base64\": false}]}], \"cpeApplicability\": [{\"nodes\": [{\"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"1.0.0\", \"versionStartIncluding\": \"0.4.0\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\", \"shortName\": \"EEF\", \"dateUpdated\": \"2026-06-15T21:56:15.262Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-48853\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-06-16T14:45:02.196Z\", \"dateReserved\": \"2026-05-25T20:44:10.696Z\", \"assignerOrgId\": \"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\", \"datePublished\": \"2026-06-15T21:56:15.262Z\", \"assignerShortName\": \"EEF\"}",
      "dataType": "CVE_RECORD",
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}


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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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Detection rules are retrieved from Rulezet.

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