CVE-2026-82729
- Source
- https://cve.org/CVERecord?id=CVE-2026-82729
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-82729.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-82729
- Aliases
-
- EEF-CVE-2026-82729
- GHSA-7p8w-j234-7qc8
- Published
- 2026-09-04T14:31:20.562Z
- Modified
- 2026-09-06T03:47:09.563911949Z
- 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
-
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.
parsehexprefix/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" ], "cna_assigner": "EEF", "unresolved_ranges": [ { "source": "AFFECTED_FIELD", "extracted_events": [ { "introduced": "1.9.3" }, { "fixed": "1.10.0" }, { "introduced": "fc7d16538db7e40b56ed489f08683225cb0197fa" }, { "fixed": "bd2a4e7513594997c140cfef9fe0e968712fb588" } ] }, { "source": "CPE_FIELD", "extracted_events": [ { "introduced": "1.9.3" }, { "fixed": "1.10.0" } ] }, { "source": "DESCRIPTION", "extracted_events": [ { "introduced": "1.9.3" }, { "fixed": "1.10.0" } ] } ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82729.json" }- References
-
- https://cna.erlef.org/cves/CVE-2026-82729.html
- https://github.com
- https://osv.dev/vulnerability/EEF-CVE-2026-82729
- https://repo.hex.pm
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82729.json
- https://github.com/elixir-mint/mint/security/advisories/GHSA-7p8w-j234-7qc8
- https://nvd.nist.gov/vuln/detail/CVE-2026-82729
- https://github.com/elixir-mint/mint/commit/bd2a4e7513594997c140cfef9fe0e968712fb588
- https://github.com/elixir-mint/mint