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CVE-2026-48853Proof of concept (PoC) published · CISASuited to automated attack · CISA

Remote code execution and denial of service via unsafe Erlang term deserialization in elixir-grpc/grpc

CVSS score

9.2

EPSS probability

%0.8

Risk score

0.1

Published

3 mo ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Official patch verified

Etkilenen ürün ve sürüm için yayımlanan güvenlik güncellemesini uygulayın.

Impact on My Inventory

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Vulnerability description

DayBreach CVE AI Research

CVE-2026-48853 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

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.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-48853 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1elixir-grpcgrpc View
2elixir-grpcgrpc View
3hexgrpc View
4hexgrpc View
Total affected vendors: 2|Products: 4

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
9.2CVSS 4.0—Vector not publishedGitHub Advisory
9.2CVSS V4_0CRITICALCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:NCVE CNA
9.2CVSS V40CRITICALCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/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:XNVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch verified

3 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

osvgrpc1.0.0

OSV düzeltilmiş sürüm: 1.0.0

cvelist

Fix commit 272a97a in elixir-grpc/grpc

Open source
reference

Fix commit 272a97a in elixir-grpc/grpc

Open source
Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Apply the official update named in the evidence only to the matching product and version.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-48853 is associated with the following CWEs:

CWE-502: Deserialization of Untrusted DataCWE-770: Allocation of Resources Without Limits or Throttling

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-48853 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsGerekmiyor
UserGerekmiyor

Official Sources and Advisories

https://github.com/elixir-grpc/grpc/security/advisories/GHSA-grp7-v8xh-rj7hvendor-advisoryEEF CNA record for CVE-2026-48853vendor-advisoryOSV record EEF-CVE-2026-48853vendor-advisoryIntroducing commit 25bcc56 in elixir-grpc/grpcvendor-advisoryFix commit 272a97a in elixir-grpc/grpcpatchhttps://nvd.nist.gov/vuln/detail/CVE-2026-48853vendor-advisoryhttps://github.com/elixir-grpc/grpc/pull/540vendor-advisoryhttps://github.com/elixir-grpc/grpc/releases/tag/v1.0.0vendor-advisoryhttps://github.com/advisories/GHSA-grp7-v8xh-rj7hvendor-advisoryhttps://github.com/elixir-grpc/grpcvendor-advisory

CVSS Vector Radar Chart

9.2 / 10
Attack VectorNetworkComplexityLowPrivilegesNoneUser Interact.NoneConfidentialityLowIntegrityNoneAvailabilityHigh

Vulnerability Scoring Details

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
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone required
User InteractionNone required
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)None
Availability (Erişilebilirlik)High

Yama doğrulandı

3 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

Follow the vendor

E
elixir-grpc logo
elixir-grpc
H
hex logo
hex

Weakness Type (CWE & CAPEC)

CWE-502 CWE-770

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