Atom table exhaustion via untrusted URL scheme in Tesla.Adapter.Mint
Allocation of Resources Without Limits or Throttling vulnerability in elixir-tesla tesla allows denial of service via atom table exhaustion in Tesla.Adapter.Mint. Tesla.Adapter.Mint.open_conn/2 converts the URL scheme of every outgoing request to a BEAM atom via String.to_atom(uri.scheme) with no allow-list validation. BEAM atoms are never garbage-collected and the atom table is bounded (approximately 1,048,576 entries by default). An attacker who can influence the URL of a Tesla request — either via an application-level URL-forwarding feature (webhook, proxy, importer) or via a Location header returned by a server when Tesla.Middleware.FollowRedirects is in the pipeline — can mint one fresh permanent atom per request by varying the scheme string. After enough requests the atom table fills and the VM crashes, taking down the entire application. This issue affects tesla: from 1.3.0 before 1.18.3.
CVE-2026-48597
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-48597
tesla
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
tesla
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"cpes": [
"cpe:2.3:a:elixir-tesla:tesla:*:*:*:*:*:*:*:*"
],
"repo": "https://github.com/elixir-tesla/tesla",
"vendor": "elixir-tesla",
"modules": [
"'Elixir.Tesla.Adapter.Mint'"
],
"product": "tesla",
"versions": [
{
"status": "affected",
"version": "1.3.0",
"lessThan": "1.18.3",
"versionType": "semver"
}
],
"packageURL": "pkg:hex/tesla",
"packageName": "tesla",
"programFiles": [
"lib/tesla/adapter/mint.ex"
],
"collectionURL": "https://repo.hex.pm",
"defaultStatus": "unaffected",
"programRoutines": [
{
"name": "'Elixir.Tesla.Adapter.Mint':open_conn/2"
}
]
},
{
"cpes": [
"cpe:2.3:a:elixir-tesla:tesla:*:*:*:*:*:*:*:*"
],
"repo": "https://github.com/elixir-tesla/tesla",
"vendor": "elixir-tesla",
"modules": [
"'Elixir.Tesla.Adapter.Mint'"
],
"product": "tesla",
"versions": [
{
"status": "affected",
"version": "ccd0823d4ba37581a37d8f6108f9a81b263237ef",
"lessThan": "4699c3cb3e2fd6078f99f45f11cf7466aeedbf0e",
"versionType": "git"
}
],
"packageURL": "pkg:github/elixir-tesla/tesla",
"packageName": "elixir-tesla/tesla",
"programFiles": [
"lib/tesla/adapter/mint.ex"
],
"collectionURL": "https://github.com",
"defaultStatus": "unaffected",
"programRoutines": [
{
"name": "'Elixir.Tesla.Adapter.Mint':open_conn/2"
}
]
}
]- Related CVEs
- CVE-2026-48597
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #1904 · Revision 1
- Added to Heist Feed
- Publisher date