---
title: "CVE-2026-93471: Dropbox esaml - Denial of Service"
description: "Dropbox esaml from 0.1.0 contains a denial of service caused by unbounded decompression of attacker-supplied compressed SAMLResponse in esaml_binding, letting unauthenticated attackers exhaust server memory and crash the Erlang VM, exploit requires sending crafted compressed SAMLResponse."
url: https://panop.io/threat-heartbeat/CVE-2026-93471/
---

# CVE-2026-93471 Dropbox esaml - Denial of Service

Dropbox esaml from 0.1.0 contains a denial of service caused by unbounded decompression of attacker-supplied compressed SAMLResponse in esaml\_binding, letting unauthenticated attackers exhaust server memory and crash the Erlang VM, exploit requires sending crafted compressed SAMLResponse.

CVSS base score 8.7 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.44% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-93471)

## 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-409](https://cwe.mitre.org/data/definitions/409.html)

## Vendor fix

Update to the latest version of esaml where this issue is fixed.

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-2026-93471](https://nvd.nist.gov/vuln/detail/CVE-2026-93471)
- [https://cna.erlef.org/cves/CVE-2026-93471.html](https://cna.erlef.org/cves/CVE-2026-93471.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-2026-93471](https://osv.dev/vulnerability/EEF-CVE-2026-93471)

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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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