CVE-2026-105270

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.

CVSS

No CVSS.

References

Link	Resource
https://cna.erlef.org/cves/CVE-2026-105270.html
https://github.com/arekinath/esaml/commit/deeb84378d5c82153b470e99d24f77c38afca14a
https://github.com/dropbox/esaml/commit/deeb84378d5c82153b470e99d24f77c38afca14a
https://github.com/handnot2/esaml/commit/deeb84378d5c82153b470e99d24f77c38afca14a
https://osv.dev/vulnerability/EEF-CVE-2026-105270
https://osv.dev/vulnerability/EEF-CVE-2026-105270

Configurations

No configuration.

History

30 Oct 2026, 19:17

Type	Values Removed	Values Added
References	~~() https://osv.dev/vulnerability/EEF-CVE-2026-105270 -~~	() https://osv.dev/vulnerability/EEF-CVE-2026-105270 -

22 Oct 2026, 07:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-22 07:16

Updated : 2026-10-30 19:17

NVD link : CVE-2026-105270

Mitre link : CVE-2026-105270

CVE.ORG link : CVE-2026-105270

JSON object : View

Products Affected

No product.

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

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