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Vulnerability · Published Aug 7, 2026 · Assigned by EEF

CVE-2026-67585Atom Exhaustion via _entities Representation Keys in DivvyPayHQ absinthe_federation

High 8.7

In plain English

A high-severity resource allocation without limits in absinthe_federation from DivvyPayHQ. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 54% of all known vulnerabilities).

Severity (CVSS 4.0)8.7High
Exploit odds (30 days)0.7%top 46.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

Allocation of Resources Without Limits or Throttling vulnerability in DivvyPayHQ absinthe_federation allows an unauthenticated remote attacker to abort the Erlang VM via crafted _entities representation keys. Every key of every object in the representations argument of the federation-mandated _entities field is converted with String.to_atom/1 by convert_key/2 in lib/absinthe/federation/schema/entities_field.ex. representations is typed as the open-ended _Any scalar, so its keys bypass schema coercion and the attacker names them freely. Atoms are never garbage collected and the BEAM atom table is hard-capped (about 1,048,576 entries by default), so one request carrying tens of thousands of unique keys creates that many permanent atoms and a handful of such requests exhausts the table and aborts the node. The impact is confined to availability: no data is read or altered, and recovery requires restarting the application. This issue affects absinthe_federation: from 0.1.0 before 0.9.3.

Affected products (as reported)

VendorProductVersions
DivvyPayHQ absinthe_federation 0.1.0 – before 0.9.3
DivvyPayHQ absinthe_federation 640a234a26b2d6fe5d9d21e00e5f4fce5645c0bf – before c3838cda2a7f65c4893291668c223b0d6acf4516

Weakness: CWE-770 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

References