Unbounded atom creation while parsing SAML messages in esaml allows atom table exhaustion
Impact
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.
Source excerpt · EEFAffected packages
Affected products
Vendor version evidence. Product records are separate from automatic dependency matching.
arekinath · EEF
esaml
1 range
arekinath · EEF
esaml
Package identity
pkg:github/arekinath/esamlIdentity supplied by EEF. Version matching requires compatible range evidence.
Compare with this publisher’s ranges. This does not inspect your installation.
affected
deeb84378d5c82153b470e99d24f77c38afca14a → before *
git versions
Other versions: unaffected
Product identifiers (CPE)
cpe:2.3:a:arekinath:esaml:*:*:*:*:*:*:*:*handnot2 · EEF
esaml
1 range
handnot2 · EEF
esaml
Package identity
pkg:github/handnot2/esamlIdentity supplied by EEF. Version matching requires compatible range evidence.
Compare with this publisher’s ranges. This does not inspect your installation.
affected
deeb84378d5c82153b470e99d24f77c38afca14a → before *
git versions
Other versions: unaffected
Product identifiers (CPE)
cpe:2.3:a:handnot2:esaml:*:*:*:*:*:*:*:*dropbox · EEF
esaml
1 range
dropbox · EEF
esaml
Package identity
pkg:hex/esamlExplore esaml →Identity supplied by EEF. Version matching requires compatible range evidence.
Compare with this publisher’s ranges. This does not inspect your installation.
affected
0.1.0 → before *
semver versions
Other versions: unaffected
Product identifiers (CPE)
cpe:2.3:a:dropbox:esaml:*:*:*:*:*:*:*:*dropbox · EEF
esaml
1 range
dropbox · EEF
esaml
Package identity
pkg:github/dropbox/esamlIdentity supplied by EEF. Version matching requires compatible range evidence.
Compare with this publisher’s ranges. This does not inspect your installation.
affected
deeb84378d5c82153b470e99d24f77c38afca14a → before *
git versions
Other versions: unaffected
Product identifiers (CPE)
cpe:2.3:a:dropbox:esaml:*:*:*:*:*:*:*:*Original source description
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.
Inside the record
Evidence available
Describes the evidence in this view, not whether the product is safe.
Original records
CVE-2026-105270View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.
cve.new JSON →Underlying weaknesses
The source’s classification of what caused the vulnerability.
Environment requirements
These conditions apply together as specified by the publisher. A matching product name alone does not establish exposure.
EEF · platform conditions
All conditions must hold
Any condition may hold
Vulnerable product
cpe:2.3:a:handnot2:esaml:*:*:*:*:*:*:*:*From (inclusive): 2.0.0
Vulnerable product
cpe:2.3:a:dropbox:esaml:*:*:*:*:*:*:*:*From (inclusive): 0.1.0
Original applicability statements
[
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:handnot2:esaml:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.0.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:dropbox:esaml:*:*:*:*:*:*:*:*",
"versionStartIncluding": "0.1.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
}
]Contributing organizations · 2
Assigning organization
Additional data publisher
What changed
Follow changesLarge field values are marked as truncated previews. Original source snapshots remain retained.