{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-48853","assignerOrgId":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db","state":"PUBLISHED","assignerShortName":"EEF","dateReserved":"2026-05-25T20:44:10.696Z","datePublished":"2026-06-15T21:56:15.262Z","dateUpdated":"2026-09-24T21:08:47.457Z"},"containers":{"cna":{"affected":[{"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.GRPC.Codec.Erlpack'"],"packageName":"grpc","packageURL":"pkg:hex/grpc","product":"grpc","programFiles":["lib/grpc/codec/erlpack.ex"],"programRoutines":[{"name":"'Elixir.GRPC.Codec.Erlpack':decode/2"}],"repo":"https://github.com/elixir-grpc/grpc","vendor":"elixir-grpc","versions":[{"lessThan":"1.0.0","status":"affected","version":"0.4.0","versionType":"semver"}]},{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.GRPC.Codec.Erlpack'"],"packageName":"elixir-grpc/grpc","packageURL":"pkg:github/elixir-grpc/grpc","product":"grpc","programFiles":["lib/grpc/codec/erlpack.ex"],"programRoutines":[{"name":"'Elixir.GRPC.Codec.Erlpack':decode/2"}],"repo":"https://github.com/elixir-grpc/grpc","vendor":"elixir-grpc","versions":[{"lessThan":"272a97a5ea1b46af1819f14a831fcf35fc91f992","status":"affected","version":"25bcc569fe2cc4478531a6c546c923205fc751c9","versionType":"git"}]}],"configurations":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"

GRPC.Codec.Erlpack must be explicitly registered as a codec on the gRPC server.

"},{"base64":false,"type":"text/markdown","value":"`GRPC.Codec.Erlpack` must be explicitly registered as a codec on the gRPC server."}],"value":"GRPC.Codec.Erlpack must be explicitly registered as a codec on the gRPC server."}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:*","versionEndExcluding":"1.0.0","versionStartIncluding":"0.4.0","vulnerable":true}],"negate":false,"operator":"OR"}],"operator":"AND"}],"credits":[{"lang":"en","type":"finder","value":"Peter Ullrich"},{"lang":"en","type":"remediation developer","value":"Paulo Valente"},{"lang":"en","type":"analyst","value":"Jonatan Männchen / EEF"}],"datePublic":"2026-06-15T21:56:15.000Z","descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"

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.

\n

'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.

\n

This issue affects grpc: from 0.4.0 before 1.0.0.

"},{"base64":false,"type":"text/markdown","value":"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.\n\n`'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.\n\nThis issue affects grpc: from 0.4.0 before 1.0.0."}],"value":"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.\n\n'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.\n\nThis issue affects grpc: from 0.4.0 before 1.0.0."}],"impacts":[{"capecId":"CAPEC-586","descriptions":[{"lang":"en","value":"CAPEC-586 Object Injection"}]},{"capecId":"CAPEC-231","descriptions":[{"lang":"en","value":"CAPEC-231 Oversized Serialized Data Payloads"}]}],"metrics":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":9.2,"baseSeverity":"CRITICAL","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-502","description":"CWE-502 Deserialization of Untrusted Data","lang":"en","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-770","description":"CWE-770 Allocation of Resources Without Limits or Throttling","lang":"en","type":"CWE"}]}],"providerMetadata":{"orgId":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db","shortName":"EEF","dateUpdated":"2026-09-24T21:08:47.457Z"},"references":[{"tags":["vendor-advisory","related"],"url":"https://github.com/elixir-grpc/grpc/security/advisories/GHSA-grp7-v8xh-rj7h"},{"name":"EEF CNA record for CVE-2026-48853","tags":["related"],"url":"https://cna.erlef.org/cves/CVE-2026-48853.html"},{"name":"OSV record EEF-CVE-2026-48853","tags":["related"],"url":"https://osv.dev/vulnerability/EEF-CVE-2026-48853"},{"name":"Introducing commit 25bcc56 in elixir-grpc/grpc","tags":["related"],"url":"https://github.com/elixir-grpc/grpc/commit/25bcc569fe2cc4478531a6c546c923205fc751c9"},{"name":"Fix commit 272a97a in elixir-grpc/grpc","tags":["patch"],"url":"https://github.com/elixir-grpc/grpc/commit/272a97a5ea1b46af1819f14a831fcf35fc91f992"}],"source":{"discovery":"EXTERNAL"},"title":"Remote code execution and denial of service via unsafe Erlang term deserialization in elixir-grpc/grpc"},"adp":[{"references":[{"url":"https://github.com/elixir-grpc/grpc/security/advisories/GHSA-grp7-v8xh-rj7h","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-16T14:44:19.175606Z","id":"CVE-2026-48853","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-06-16T14:45:02.196Z"}}]}}