EEF-CVE-2026-82729
- Source
- https://cna.erlef.org/osv/EEF-CVE-2026-82729.html
- Import Source
- https://cna.erlef.org/osv/EEF-CVE-2026-82729.json
- JSON Data
- https://api.osv.dev/v1/vulns/EEF-CVE-2026-82729
- Aliases
-
- CVE-2026-82729
- GHSA-7p8w-j234-7qc8
- Published
- 2026-09-04T14:31:20.562Z
- Modified
- 2026-09-04T14:55:36.402921692Z
- Severity
-
- 6.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CVSS Calculator
- Summary
- Quadratic chunk-size parsing in Mint.HTTP1.Parse allows CPU-exhaustion DoS
- Details
-
Summary
Inefficient Algorithmic Complexity vulnerability in elixir-mint mint allows a remote HTTP server to exhaust CPU on the client host and cause a denial of service.
parse_hex_prefix/2 in lib/mint/http1/parse.ex folds each hex digit of a chunked response's chunk-size field into an arbitrary-precision accumulator with acc * 16 + digit and imposes no limit on the digit count. Because the accumulator grows without bound, the multiplication is not constant time and one pass over N digits costs O(N squared). handle_data/2 prepends conn.buffer and re-parses from the start on every socket message, so a server that dribbles the digits out in small packets makes the client pay that cost repeatedly. A run of roughly 512,000 hex digits costs over ten seconds of CPU in a single pass, measured on stock defaults. The parser reaches this state 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 1.9.3 before 1.10.0.
- Database specific
{ "cwe_ids": [ "CWE-407" ], "capec_ids": [ "CAPEC-130" ], "cpe_ids": [ "cpe:2.3:a:elixir-mint:mint:*:*:*:*:*:*:*:*" ] }- References
- Credits
-
-
- Tr3bor - FINDER
-
- Tr3bor - REPORTER
-
- Andrea Leopardi - REMEDIATION_DEVELOPER
-
- Jonatan Männchen / EEF - COORDINATOR
-
Affected packages
Hex / mint
Package
- Name
- mint
- Purl
- pkg:hex/mint