CVE-2023-41317Network attack vector

Process termination via anonymous subscription operation

Published Sep 5, 2023 · Updated Sep 30, 2024

Denial of service in Apollo GraphQL Apollo Router Core 1.28.0 through 1.29.0 allows remote attackers to terminate the router. The WebSocket subgraph service obtains an anonymous operation's missing name through a context accessor that unwraps the stored value as a string, causing a panic instead of accepting the absent name. Reachability requires a supergraph schema with subscription root fields and subscriptions enabled in YAML, a feature disabled by default; the bounded consequence is termination of one router process.

CVSS severity7.5
High
EPSS probability0.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Apollo GraphQL Apollo Router Core 1.28.0 through 1.29.0 allows remote attackers to terminate the router. The WebSocket subgraph service obtains an anonymous operation's missing name through a context accessor that unwraps the stored value as a string, causing a panic instead of accepting the absent name. Reachability requires a supergraph schema with subscription root fields and subscriptions enabled in YAML, a feature disabled by default; the bounded consequence is termination of one router process.

The record

CVE
CVE-2023-41317
Published
Sep 5, 2023
Updated
Sep 30, 2024
Vendor
Apollo GraphQL
Product
Apollo Router Core
Classifications
CWE-248, CWE-755, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 5, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 30, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 1.28.0, < 1.29.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apollo GraphQL · Apollo Router Coreversion=>= 1.28.0, < 1.29.1

Published CVSS scores

7.5GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.9NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-248Uncaught Exception
CWE-755Improper Handling of Exceptional Conditions
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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