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CVE-2026-42793— Atom table exhaustion via attacker-controlled GraphQL SDL names in absinthe

Quick assessment

Affected
absinthe-graphql absinthe
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Absinthe是Absinthe开源的一个基于Elixir的GraphQL实现框架。 absinthe 1.5.0版本至1.10.2之前版本存在安全漏洞，该漏洞源于资源分配无限制或节流，可能导致未经身份验证的攻击者通过解析攻击者控制的GraphQL SDL耗尽原子表并导致拒绝服务。

AI Predicted 7.5 Difficulty: Easy EPSS 0.61% · P49

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 2

VendorProduct Version RangeStatus
absinthe-graphql absinthe 1.5.0< 1.10.2 affected
d0eae7764520d4e8e5dfff619068c0de911aec33< dd842b938e3823f345c10416914ffab5d5536838 affected
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I. Basic Information for CVE-2026-42793

Vulnerability Information
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Vulnerability Title
Atom table exhaustion via attacker-controlled GraphQL SDL names in absinthe
Source: CVE Program / CVE List V5
Vulnerability Description
Allocation of Resources Without Limits or Throttling vulnerability in absinthe-graphql absinthe allows unauthenticated denial of service via atom table exhaustion when parsing attacker-controlled GraphQL SDL. Multiple Blueprint.Draft.convert/2 implementations in Absinthe's SDL language modules call String.to_atom/1 on attacker-controlled names from parsed GraphQL SDL documents, including directive names, field names, type names, and argument names. Because atoms are never garbage-collected and the BEAM atom table has a fixed limit (default 1,048,576), each unique name permanently consumes one slot. An attacker can exhaust the atom table by submitting SDL documents containing enough unique names, causing the Erlang VM to abort with system_limit and taking down the entire node. Any application that passes attacker-controlled GraphQL SDL through Absinthe's parser is exposed — for example, a schema-upload endpoint, a federation gateway that ingests remote SDL, or any developer tool that runs the parser over user-supplied documents. This issue affects absinthe: from 1.5.0 before 1.10.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
Absinthe 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Absinthe是Absinthe开源的一个基于Elixir的GraphQL实现框架。 absinthe 1.5.0版本至1.10.2之前版本存在安全漏洞，该漏洞源于资源分配无限制或节流，可能导致未经身份验证的攻击者通过解析攻击者控制的GraphQL SDL耗尽原子表并导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
absinthe-graphql absinthe 1.5.0 ~ 1.10.2 cpe:2.3:a:absinthe-graphql:absinthe:*:*:*:*:*:*:*:*
absinthe-graphql absinthe d0eae7764520d4e8e5dfff619068c0de911aec33 ~ dd842b938e3823f345c10416914ffab5d5536838 cpe:2.3:a:absinthe-graphql:absinthe:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-42793

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III. Intelligence Information for CVE-2026-42793

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Patches & Fixes for CVE-2026-42793 (1)

Vendor Advisories for CVE-2026-42793 (3)

Same Patch Batch · absinthe-graphql · 2026-05-08 · 3 CVEs total

CVE-2026-42794 Reflected XSS via backslash bypass in GraphiQL js_escape in absinthe_plug
CVE-2026-43967 Quadratic fragment-name uniqueness check causes denial of service in absinthe

IV. Related Vulnerabilities

Same product: absinthe
Same vendor: absinthe-graphql
Same weakness: CWE-770