Answer in brief
CVE-2026-111101 records a High severity (CVSS 8.7) vulnerability in HTTP/1.1 chunked request bodies made of 1-byte chunks amplify memory use in Bandit. The current sources do not mark it as known exploited. The current feed maps mtrudel/bandit (generic), mtrudel/mtrudel/bandit (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps mtrudel/bandit (generic), mtrudel/mtrudel/bandit (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| mtrudel/banditgeneric | >=0.1.0 <1.14.0 | 1.14.0 |
| mtrudel/mtrudel/banditgeneric | >=7201270c34b90f6c9e15c0386c2bb802c0c72ab4 <220b9dfd27f9a21305be2afc75cbe585ddc24e7a | 220b9dfd27f9a21305be2afc75cbe585ddc24e7a |
Published upstream
Oct 26, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 26, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 26, 2026
Allocation of Resources Without Limits or Throttling vulnerability in the HTTP/1.1 chunked body reader of mtrudel bandit allows an unauthenticated remote attacker to exhaust server memory and CPU via a request body made of many 1-byte chunks. The chunked reader in lib/bandit/http1/socket.ex keeps every chunk as its own list cell and binary term until IO.iodata_to_binary/1 joins them, and nothing limits the number of chunks. The :length option of read_body/2 counts only data bytes, so tiny chunks cost far more memory than their payload: 48 MB of 1-byte chunks grew one handler process to about 500 MB and took about 6 s of CPU. The route does not need to read the body, because on keep-alive connections ensure_completed/1 drains unread bodies through the same reader. This issue affects bandit: from 0.1.0 before 1.14.0.
Quoted source text, attributed separately from HOL analysis.