CVE-2026-82728: high-severity vulnerability in elixir-mint mint
Unbounded HTTP/1 status-line and chunk-extension buffering in Mint causes memory-exhaustion DoS
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.2epss 0.5%
Allocation of Resources Without Limits or Throttling vulnerability in elixir-mint mint allows a remote HTTP server to exhaust memory on the client host and cause a denial of service.
Two HTTP/1 response-parser states accumulate server data without any cap. In lib/mint/http1.ex, decode_status_line/4 stores the unconsumed data in conn.buffer when the status line is incomplete, and decode_body/5 does the same for an unterminated chunk-extension line. Both wait for a CRLF the server never has to send, and conn.buffer is prepended to every subsequent socket message. The :max_header_list_size budget is wired only into decode_headers/5 and decode_trailer_headers/4, so neither of these states is covered by it. A malicious server, or one reached through an attacker-controlled redirect or a fetched URL, streams bytes indefinitely until the BEAM node is killed by the operating system out-of-memory handler. The chunk-extension variant is reached after a valid status line and a complete, valid header section, so an intermediary inspecting only headers sees an ordinary 200 response.
This issue affects mint: from 0.1.0 before 1.10.0.
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
Affected products
elixir-mint · mintRelated CVEs — elixir-mint mint
In the same product, most dangerous first.
CVE-2026-82672MEDIUMUnvalidated chunk-size line tail in Mint HTTP/1 client enables response smuggling against strict intermediaries on pooled connectionsEPSS 0.5%CVE-2026-82729MEDIUMQuadratic chunk-size parsing in Mint.HTTP1.Parse allows CPU-exhaustion DoSEPSS 0.5%CVE-2026-59249MEDIUMSign-tolerant HTTP/1 chunk-size parser in Mint enables response smuggling against strict intermediaries on pooled connectionsEPSS 0.5%CVE-2026-59246MEDIUMZero-length HTTP/2 CONTINUATION frames bypass Mint's header-block byte-size cap and exhaust client memoryEPSS 0.5%CVE-2026-58229HIGHUnbounded HTTP/1 response-header and chunked-trailer accumulation in Mint causes memory-exhaustion DoSEPSS 0.5%CVE-2026-56810HIGHmint buffers an entire chunked response chunk in memory in Mint.HTTP1.decode_body/5EPSS 0.4%