CVE-2026-105270

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Source
https://cve.org/CVERecord?id=CVE-2026-105270
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-105270.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-105270
Aliases
Published
2026-10-22T06:58:43Z
Modified
2026-10-23T02:45:13Z
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
Unbounded atom creation while parsing SAML messages in esaml allows atom table exhaustion
Details

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.

Database specific 
{
    "cna_assigner":  "EEF",
    "cwe_ids":  [
        "CWE-770"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/105xxx/CVE-2026-105270.json",
    "unresolved_ranges":  [
        {
            "extracted_events":  [
                {
                    "range":  [
                        {
                            "introduced":  "deeb84378d5c82153b470e99d24f77c38afca14a"
                        },
                        {
                            "fixed":  "*"
                        },
                        {
                            "introduced":  "deeb84378d5c82153b470e99d24f77c38afca14a"
                        },
                        {
                            "fixed":  "*"
                        },
                        {
                            "introduced":  "0.1.0"
                        },
                        {
                            "fixed":  "*"
                        },
                        {
                            "introduced":  "deeb84378d5c82153b470e99d24f77c38afca14a"
                        },
                        {
                            "fixed":  "*"
                        }
                    ],
                    "source":  "AFFECTED_FIELD",
                    "strategy":  "StandardRange"
                }
            ]
        }
    ]
}
References

Affected packages

Git / github.com/arekinath/esaml

Affected ranges

Type
GIT
Repo
https://github.com/arekinath/esaml
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
deeb84378d5c82153b470e99d24f77c38afca14a
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "fixed":  "deeb84378d5c82153b470e99d24f77c38afca14a"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        }
    ]
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-105270.json"

Git / github.com/handnot2/esaml

Affected ranges

Type
GIT
Repo
https://github.com/handnot2/esaml
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
deeb84378d5c82153b470e99d24f77c38afca14a
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "fixed":  "deeb84378d5c82153b470e99d24f77c38afca14a"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        }
    ]
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-105270.json"