CVE-2026-113436: mtrudel bandit · Inefficient Algorithmic Complexity
Affects mtrudel banditSource CVE Database V5
Not known to be exploited · CVSS 8.7 High : upgrade to 1.14.0 soon.
Data as of 26 Oct 2026, 17:30 UTC
- 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:NExploitation evidence
Disclosed: evidence found.
CVE published 26 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| mtrudelbandit | Affected
| Fixed in
|
| banditmtrudel/bandit | Affected
| Fixed in
|
Hexbanditpkg:hex/banditOther threats | Affected
| Fixed in
|
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.
AI-suggested
Upgrade to mtrudel bandit version 1.14.0 or later, where this vulnerability is fixed.
Description
Inefficient Algorithmic Complexity vulnerability in the header integer parser of mtrudel bandit allows an unauthenticated remote attacker to consume server CPU via a content-length value or a Host or :authority port made of thousands of digits. Bandit.Headers.parse_integer/2 in lib/bandit/headers.ex builds the number one digit at a time with no limit on the digit count, allocating a new bignum at each step, so one value costs time quadratic in its length. It runs on raw request input over HTTP/1 and HTTP/2, before any range check. Over HTTP/2, a 4,000-digit value can be stored once in the HPACK dynamic table and re-sent on each new stream for about one byte: 124 KB of traffic kept the server busy for 27.9 s. This issue affects bandit: from 1.0.0-pre.7 before 1.14.0.
References
- github.com/mtrudel/bandit/security/advisories/GHSA-29cr-8477-rg6r (opens in a new tab)
- cna.erlef.org/cves/CVE-2026-113436.html (opens in a new tab)
- osv.dev/vulnerability/EEF-CVE-2026-113436 (opens in a new tab)
- github.com/mtrudel/bandit/commit/e0c8c0c30af9b0f57d8aafac37ddd9294363a8be (opens in a new tab)
- github.com/mtrudel/bandit/commit/220b9dfd27f9a21305be2afc75cbe585ddc24e7a (opens in a new tab)