PT-2026-49534 · Elixir Grpc+1 · Grpc

Jonatan Männchen + 2 · Published 2026-06-15 · Updated 2026-06-16 · CVE-2026-48854

Positive Technologies (AI Summary)

CVSS v4.0

8.7

High

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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

Name of the Vulnerable Software and Affected Versions grpc versions 0.3.1 through 0.9.x

Description Unauthenticated attackers can exhaust the BEAM memory and crash the server by streaming a large or slow-trickle unary request body. The function read full body/3 in 'Elixir.GRPC.Server.Adapters.Cowboy.Handler' accumulates every received chunk into a single growing binary without a size cap. Furthermore, if the client omits the grpc-timeout header, the per-chunk read timeout is set to infinity, enabling a slow-trickle client to maintain the connection indefinitely while memory consumption increases. A single connection is enough to exhaust server memory and crash the node.

Recommendations Update to version 1.0.0 or later.

Fix

DoS

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

CVE-2026-48854

GHSA-Q8GF-9RVJ-GMGJ

Affected Products

Grpc

References · 7

• https://github.com/elixir-grpc/grpc/security/advisories/GHSA-q8gf-9rvj-gmgj · Vendor Advisory
• https://github.com/elixir-grpc/grpc/commit/49e18c3ec6bb9afe2f712caad3dbab5c56a68a00 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-48854 · Security Note
• https://osv.dev/vulnerability/EEF-CVE-2026-48854 · Vendor Advisory
• https://twitter.com/VulmonFeeds/status/2066700350157967665 · Twitter Post
• https://cna.erlef.org/cves/CVE-2026-48854.html · Note
• https://hex.pm/packages/grpc · Note