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VulnerabilityPublished

CVE-2026-110499: mtrudel bandit · Unthrottled Resource Allocation

Affects mtrudel banditSource CVE Database V5

0

Not known to be exploited · CVSS 8.7 High : upgrade to 1.14.0 soon.

Data as of 26 Oct 2026, 14:01 UTC

CVSS 4.0 base score
8.7High
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 1.14.0, 220b9dfd27f9a21305be2afc75cbe585ddc24e7a
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 26 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade bandit to 1.14.0; bandit to 220b9dfd27f9a21305be2afc75cbe585ddc24e7a.

Affected software

ProductAffectedFixed in
mtrudelbanditAffected
  • >=0.3.6 <1.14.0
Fixed in
  • 1.14.0
banditmtrudel/banditAffected
  • ≥ 0e68313fab9d204257ebad5c447e4cd9cea8e0ea, < 220b9dfd27f9a21305be2afc75cbe585ddc24e7a
Fixed in
  • 220b9dfd27f9a21305be2afc75cbe585ddc24e7a
Hexbanditpkg:hex/banditOther threatsAffected
  • >=0.3.6 <1.14.0
Fixed in
  • 1.14.0

CPE configurations (1)

  • cpe:2.3:a:mtrudel:bandit:*:*:*:*:*:*:*:*

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

Allocation of Resources Without Limits or Throttling vulnerability in the HTTP/2 implementation of mtrudel bandit allows an unauthenticated remote attacker to grow per-connection memory and CPU cost without bound via a large SETTINGS_HEADER_TABLE_SIZE. Bandit resizes its HPACK encoder table to whatever size the client advertises, up to 2^32-1 bytes, and indexes response headers into it. Because responses carry distinct values such as date or content-length, nothing is evicted and the table grows with every response for the life of the connection, while each lookup scans it linearly. The SETTINGS handling in Bandit.HTTP2.Connection (lib/bandit/http2/connection.ex) passes remote_settings.header_table_size to HPAX.resize/2 with no server-side cap, and encode_headers encodes every response header as :store. Serving N responses on one connection therefore costs O(N²) CPU in the connection process. This issue affects bandit: from 0.3.6 before 1.14.0.

References

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