CVE-2026-80051Public exploit

Process termination via recursive scalar coercion

Published Aug 25, 2026 · Updated Aug 25, 2026

Improper scalar validation in GraphQL for Go 0.8.1 and earlier allows attackers to terminate a process via deeply nested variables. In scalars.go, coerceString passes wrong-typed values to fmt.Sprintf and coerceBool converts unhandled values to false instead of rejecting them. Process termination requires extreme nesting delivered through an uncapped decoder or programmatically built variables; ordinary Go JSON decoding stops well below the required depth.

CVSS severity5.9
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper scalar validation in GraphQL for Go 0.8.1 and earlier allows attackers to terminate a process via deeply nested variables. In scalars.go, coerceString passes wrong-typed values to fmt.Sprintf and coerceBool converts unhandled values to false instead of rejecting them. Process termination requires extreme nesting delivered through an uncapped decoder or programmatically built variables; ordinary Go JSON decoding stops well below the required depth.

The record

CVE
CVE-2026-80051
Published
Aug 25, 2026
Updated
Aug 25, 2026
Vendor
graphql-go
Product
graphql
Classifications
CWE-1287, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 2026Record 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=0 <=0.8.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

graphql-go · graphqlversion=0 <=0.8.1

Published CVSS scores

5.9MITRE CNACVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1287Improper Validation of Specified Type of Input
T1499.004Application or System Exploitation

Public exploit references

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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