---
title: "CVE-2026-105270: Dropbox esaml_binding - Denial of Service"
description: "Dropbox esaml_binding from 0.1.0 contains an allocation of resources without limits or throttling vulnerability caused by unbounded atom creation in esaml_binding:decode_response/2 parsing SAMLResponse, letting unauthenticated attackers exhaust the Erlang VM atom table and crash the node via crafted SAMLResponse, exploit requires sending crafted SAMLResponse requests."
url: https://panop.io/threat-heartbeat/CVE-2026-105270/
---

# CVE-2026-105270 Dropbox esaml\_binding - Denial of Service

Dropbox esaml\_binding from 0.1.0 contains an allocation of resources without limits or throttling vulnerability caused by unbounded atom creation in esaml\_binding:decode\_response/2 parsing SAMLResponse, letting unauthenticated attackers exhaust the Erlang VM atom table and crash the node via crafted SAMLResponse, exploit requires sending crafted SAMLResponse requests.

CVSS base score 8.7 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.34% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-105270)

## Details

Type

Denial of Service

Impact

Denial Of Service

CVSS 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Published

22 October 2026

Updated

23 October 2026

Weakness

[CWE-770](https://cwe.mitre.org/data/definitions/770.html)

## Vendor fix

Update to the latest version with fixed atom table handling or apply patches limiting atom creation.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-105270](https://nvd.nist.gov/vuln/detail/CVE-2026-105270)
- [https://cna.erlef.org/cves/CVE-2026-105270.html](https://cna.erlef.org/cves/CVE-2026-105270.html)
- [https://github.com/arekinath/esaml/commit/deeb84378d5c82153b470e99d24f77c38afca14a](https://github.com/arekinath/esaml/commit/deeb84378d5c82153b470e99d24f77c38afca14a)
- [https://github.com/dropbox/esaml/commit/deeb84378d5c82153b470e99d24f77c38afca14a](https://github.com/dropbox/esaml/commit/deeb84378d5c82153b470e99d24f77c38afca14a)
- [https://github.com/handnot2/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)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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