CVE-2026-86696

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Source
https://cve.org/CVERecord?id=CVE-2026-86696
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-86696.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-86696
Aliases
Published
2026-10-22T06:59:07Z
Modified
2026-10-24T02:48:40Z
Severity
  • 8.2 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
Unbounded atom creation from unsigned LogoutResponse status codes in esaml allows atom table exhaustion
Details

Allocation of Resources Without Limits or Throttling vulnerability in esaml in dropbox esaml allows an unauthenticated attacker to exhaust the Erlang VM atom table and crash the node via unsigned LogoutResponse messages.

esaml:status_code_map/1 in src/esaml.erl maps any StatusCode value it does not recognize to an atom with list_to_atom/1 on the last colon-separated segment of the URN. esaml_sp:validate_logout_response/2 verifies a signature only when the message carries one, so an unsigned LogoutResponse posted to the single-logout endpoint reaches esaml:decode_logout_response/1 and mints one permanent atom per distinct status value. Atoms are never reclaimed and the VM caps the atom table at about one million entries, so an attacker who posts that many distinct values aborts 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/2026/86xxx/CVE-2026-86696.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "range": [
                        {
                            "introduced": "be692b56245071899757afa7ef47e43593d3de96"
                        },
                        {
                            "fixed": "*"
                        },
                        {
                            "introduced": "be692b56245071899757afa7ef47e43593d3de96"
                        },
                        {
                            "fixed": "*"
                        },
                        {
                            "introduced": "0.1.0"
                        },
                        {
                            "fixed": "*"
                        },
                        {
                            "introduced": "be692b56245071899757afa7ef47e43593d3de96"
                        },
                        {
                            "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
be692b56245071899757afa7ef47e43593d3de96
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "fixed": "be692b56245071899757afa7ef47e43593d3de96"
                }
            ],
            "source": "REFERENCES_COMMIT"
        }
    ]
}
Type
GIT
Repo
https://github.com/handnot2/esaml
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
be692b56245071899757afa7ef47e43593d3de96
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "fixed": "be692b56245071899757afa7ef47e43593d3de96"
                }
            ],
            "source": "REFERENCES_COMMIT"
        }
    ]
}

Affected versions

v0.*
v0.1

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-86696.json"