Exploitation ongoing with high activity in latest observed window (2 mentions)
Recommended action window: Immediate (within 24h)
NVD description
Reliance on Untrusted Inputs in a Security Decision vulnerability in mtrudel bandit allows unauthenticated transport-state spoofing on plaintext HTTP connections. 'Elixir.Bandit.Pipeline':determine_scheme/2 in lib/bandit/pipeline.ex returns the client-supplied URI scheme verbatim, ignoring the transport's secure? flag. HTTP/1.1 absolute-form request targets (e.g. GET https://victim/path HTTP/1.1) and the HTTP/2 :scheme pseudo-header are both attacker-controlled strings that flow through this function. Over a plaintext TCP connection, a client can declare https and Bandit will set conn.scheme = :https even though no TLS was negotiated. Downstream Plug consumers that branch on conn.scheme are silently misled: Plug.SSL's already-secure branch skips its HTTP→HTTPS redirect, cookies emitted with secure: true are sent over plaintext, audit logs record requests as having arrived over HTTPS, and CSRF/SameSite gating may make incorrect decisions. This issue affects bandit: from 1.0.0 before 1.11.0.
Priority
LOW
Exploitation
ACTIVE
PoC
NONE
Patch
NONE
Momentum
STABLE
| Date | Total | Labels |
|---|
| 2026-05-01 | 2 | Disclosure2 |
| 2026-05-02 | 2 | Active Exploitation1Disclosure1 |
CVE-2026-39807 Reliance on Untrusted Inputs in a Security Decision vulnerability in mtrudel bandit allows unauthenticated transport-state spoofing on plaintext HTTP connections. 'E… https://www.cve.org/CVERecord?id=CVE-2026-39807
Post summary
The text announces CVE-2026-39807, detailing a transport‑state spoofing flaw in mtrudel bandit over plaintext HTTP, but offers no PoC, exploit, patch, or active exploitation evidence.
Our CTI team identified a lot of activities targeting mtrudel bandit (CVE-2026-39807) https://vuldb.com/vuln/360795/cti
Post summary
CTI observations indicate numerous activities targeting CVE‑2026‑39807 (mtrudel bandit), signifying active exploitation in the wild.
CVE-2026-39807 Unauthenticated Transport-State Spoofing in Bandit HTTP Server via Untrusted Scheme Input https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-39807
Post summary
The text announces a newly disclosed vulnerability (CVE‑2026‑39807) affecting Bandit HTTP Server, describing unauthenticated transport‑state spoofing via untrusted scheme input, without any PoC, exploit, or patch information.
🚨*CVE* CVE-2026-39807 Reliance on Untrusted Inputs in a Security Decision vulnerability in mtrudel bandit allows unauthenticated transport-state spoofing on plaintext HTTP connections. 'E… https://www.cve.org/CVERecord?id=CVE-2026-39807 ----- Traducción: CVE-2026-39807 Dep… http://infoflow.cloud`
Post summary
The post announces CVE‑2026‑39807, noting an unauthenticated transport‑state spoofing flaw in mtrudel bandit, but offers no PoC, exploit, patch, or evidence of active exploitation.