{"id":"CVE-2026-48853","title":"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 flow…","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 flow…","severity":"critical","cvss":9.2,"cvssVector":"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","cwe":["CWE-502","CWE-770"],"vendor":"elixir-grpc","product":"grpc","affected":["grpc >= 0.4.0 < 1.0.0","elixir-grpc/grpc >= 25bcc569fe2cc4478531a6c546c923205fc751c9 < 272a97a5ea1b46af1819f14a831fcf35fc91f992"],"patched":["grpc 1.0.0"],"published":"2026-06-15","updated":"2026-09-24","sourceUpdated":"2026-09-24T22:16:59.820","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-48853","references":[{"url":"https://cna.erlef.org/cves/CVE-2026-48853.html","label":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db"},{"url":"https://github.com/elixir-grpc/grpc/commit/25bcc569fe2cc4478531a6c546c923205fc751c9","label":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db"},{"url":"https://github.com/elixir-grpc/grpc/commit/272a97a5ea1b46af1819f14a831fcf35fc91f992","label":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db"},{"url":"https://github.com/elixir-grpc/grpc/security/advisories/GHSA-grp7-v8xh-rj7h","label":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db"},{"url":"https://osv.dev/vulnerability/EEF-CVE-2026-48853","label":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db"},{"url":"https://github.com/elixir-grpc/grpc/security/advisories/GHSA-grp7-v8xh-rj7h","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-48853"},{"url":"https://github.com/elixir-grpc/grpc/pull/540"},{"url":"https://github.com/elixir-grpc/grpc/releases/tag/v1.0.0"},{"url":"https://github.com/advisories/GHSA-grp7-v8xh-rj7h"}],"tags":["nvd","cve.org","exploit-available","ghsa","erlang"],"epss":0.00784,"epssPercentile":0.55866,"aliases":["GHSA-grp7-v8xh-rj7h"],"ecosystem":"erlang","exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"total","timestamp":"2026-06-16T14:44:19.175606Z"},"cvssSource":"cna","ingestedAt":"2026-08-25T18:30:21.311Z","slug":"CVE-2026-48853","body":"## Overview\n\nDeserialization 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-48853)\n\nAffected packages:\n\n- `grpc >= 0.4.0, < 1.0.0`\n\nPatched in:\n\n- `grpc 1.0.0`\n\nSource: https://github.com/advisories/GHSA-grp7-v8xh-rj7h","depth":"abyssal","depthScore":63,"depthScoreParts":{"impact":50.6,"likelihood":0.2,"exploitation":12,"ransomware":0},"changes":[{"seq":210410,"id":"CVE-2026-48853","ts":1790286858297,"field":"exploit_available","old":"false","new":"true"},{"seq":210409,"id":"CVE-2026-48853","ts":1790286858297,"field":"cvss","old":null,"new":"9.2"}]}