EEF-CVE-2026-49754
- Source
- https://cna.erlef.org/osv/EEF-CVE-2026-49754.html
- Import Source
- https://cna.erlef.org/osv/EEF-CVE-2026-49754.json
- JSON Data
- https://api.osv.dev/v1/vulns/EEF-CVE-2026-49754
- Aliases
-
- CVE-2026-49754
- GHSA-2p26-p43x-fhp8
- Published
- 2026-06-02T14:15:14.951Z
- Modified
- 2026-06-02T19:09:14.747Z
- 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
- HTTP/2 CONTINUATION flood in Mint client via unbounded header-block accumulation
- Details
-
Summary
Allocation of Resources Without Limits or Throttling vulnerability in elixir-mint Mint allows attacker-controlled HTTP/2 servers to exhaust memory in a Mint client (HTTP/2 CONTINUATION flood).
When Mint's HTTP/2 receive path observes a HEADERS frame without the ENDHEADERS flag, the unparsed header-block fragment is parked in conn.headersbeingprocessed, and every subsequent CONTINUATION frame on that stream is appended to the accumulator. Nothing in the receive path caps the accumulator: there is no per-stream size limit, no CONTINUATION frame-count limit, and maxheaderlistsize is only enforced on outgoing requests, never on inbound header blocks (its default is :infinity).
A malicious or compromised HTTP/2 server can stream an endless sequence of CONTINUATION frames (each up to the peer-advertised SETTINGSMAXFRAME_SIZE) and drive the client's iolist to arbitrary size, causing memory exhaustion and BEAM process death. A single connection to an attacker-controlled HTTP/2 endpoint is sufficient.
This issue affects mint: from 0.1.0 before 1.9.0.
Workaround
Restrict Mint to HTTP/1 on connections to untrusted servers by passing protocols: [:http1] to Mint.HTTP.connect/4. This avoids the vulnerable HTTP/2 receive path entirely, at the cost of losing HTTP/2 for those connections.
- Database specific
{ "cwe_ids": [ "CWE-770" ], "cpe_ids": [ "cpe:2.3:a:elixir-mint:mint:*:*:*:*:*:*:*:*" ], "capec_ids": [ "CAPEC-130" ] }- References
- Credits
-
-
- Peter Ullrich - FINDER
-
- Eric Meadows-Jönsson - REMEDIATION_DEVELOPER
-
- Jonatan Männchen / EEF - ANALYST
-
Affected packages
Hex / mint
Package
- Name
- mint
- Purl
- pkg:hex/mint