Vulnerability Description
Allocation of Resources Without Limits or Throttling vulnerability in esaml_binding in dropbox esaml allows an unauthenticated attacker to exhaust the Erlang VM atom table and crash the node via a crafted SAMLResponse. esaml_binding:decode_response/2 parses the decoded SAMLResponse with xmerl_scan:string/2, which interns every element name, attribute name, and namespace prefix it reads as a permanent atom. The SAML consume (ACS) and single-logout endpoints call it on unauthenticated requests before any signature check, so one well-formed document with thousands of distinct names mints thousands of atoms while staying inside the 128 KB request body limit. Atoms are never reclaimed and the VM caps the atom table at about one million entries, so a few dozen requests abort the node. This issue affects esaml: from 0.1.0 onward.
Related Weaknesses (CWE)
References
- https://cna.erlef.org/cves/CVE-2026-105270.html
- https://github.com/arekinath/esaml/commit/deeb84378d5c82153b470e99d24f77c38afca1
- https://github.com/dropbox/esaml/commit/deeb84378d5c82153b470e99d24f77c38afca14a
- https://github.com/handnot2/esaml/commit/deeb84378d5c82153b470e99d24f77c38afca14
- https://osv.dev/vulnerability/EEF-CVE-2026-105270
- https://osv.dev/vulnerability/EEF-CVE-2026-105270
FAQ
What is CVE-2026-105270?
CVE-2026-105270 is a documented vulnerability. Allocation of Resources Without Limits or Throttling vulnerability in esaml_binding in dropbox esaml allows an unauthenticated attacker to exhaust the Erlang VM atom table and crash the node via a cra...
How severe is CVE-2026-105270?
CVSS scoring is not yet available for CVE-2026-105270. Check NVD for updates.
Is there a patch for CVE-2026-105270?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.