CVE-2026-43967
- Source
- https://cve.org/CVERecord?id=CVE-2026-43967
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43967.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2026-43967
- Aliases
- Published
- 2026-05-08T15:42:34.347Z
- Modified
- 2026-05-28T03:53:50.496179620Z
- Severity
-
- 8.7 (High) CVSS_V4 - 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 CVSS Calculator
- Summary
- Quadratic fragment-name uniqueness check causes denial of service in absinthe
- Details
-
Inefficient Algorithmic Complexity vulnerability in absinthe-graphql absinthe allows unauthenticated denial of service via quadratic fragment-name uniqueness validation.
'Elixir.Absinthe.Phase.Document.Validation.UniqueFragmentNames':run/2 iterates over all fragments and for each one calls duplicate?/2, which evaluates Enum.count(fragments, &(&1.name == name)) — a full linear scan of the fragment list. The result is O(N²) comparisons per document, where N is the number of fragment definitions supplied by the caller.
Because input.fragments is built directly from the GraphQL query body, N is fully attacker-controlled. A minimum-size fragment definition is roughly 16 bytes, so a ~1 MB document carries ~60,000 fragments and forces ~3.6 × 10⁹ comparisons inside this single validation phase. No authentication, schema knowledge, or special configuration is required.
This issue affects absinthe: from 1.2.0 before 1.10.2.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43967.json", "unresolved_ranges": [ { "extracted_events": [ { "introduced": "0b46e3bcc06c0d3797bacd64761b908a84646c1d" }, { "fixed": "223600c520493dcaf95080af552c413099f92c9d" } ], "source": "AFFECTED_FIELD" } ], "cwe_ids": [ "CWE-407" ], "cna_assigner": "EEF" }- References
-
- https://cna.erlef.org/cves/CVE-2026-43967.html
- https://github.com
- https://osv.dev/vulnerability/EEF-CVE-2026-43967
- https://repo.hex.pm
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43967.json
- https://github.com/absinthe-graphql/absinthe/security/advisories/GHSA-9mhv-8h52-q7q2
- https://nvd.nist.gov/vuln/detail/CVE-2026-43967
- https://github.com/absinthe-graphql/absinthe/commit/223600c520493dcaf95080af552c413099f92c9d
- https://github.com/absinthe-graphql/absinthe