Baitaphish
Security intelligence
SearchLatest briefing
CVE Explorer

CVE-2026-39807

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 fu
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:f19620ac6bfe3f9ef039c0ebfaad38f5af8ab5d6823374a173c489bdcaedae29
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:mtrudel:bandit:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.Bandit.Pipeline'"],"packageName":"bandit","packageURL":"pkg:hex/bandit","product":"bandit","programFiles":["lib/bandit/pipeline.ex"],"programRoutines":[{"name":"'Elixir.Bandit.Pipeline':determine_scheme/2"}],"repo":"https://github.com/mtrudel/bandit","vendor":"mtrudel","versions":[{"lessThan":"1.11.0","status":"affected","version":"1.0.0","versionType":"semver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b1c23db4ee63e47d9b53c2d8f467e70ad6fd3f994b3e8721dabed21114500d48 · sha256:7dd5cd60613314eb… · /containers/cna/affected/0

{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:mtrudel:bandit:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.Bandit.Pipeline'"],"packageName":"mtrudel/bandit","packageURL":"pkg:github/mtrudel/bandit","product":"bandit","programFiles":["lib/bandit/pipeline.ex"],"programRoutines":[{"name":"'Elixir.Bandit.Pipeline':determine_scheme/2"}],"repo":"https://github.com/mtrudel/bandit","vendor":"mtrudel","versions":[{"lessThan":"45feea20dea8af7ffd7245271107b695c040e667","status":"affected","version":"ff2f829326cd5dcf7335939aef9775269d881e28","versionType":"git"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b1c23db4ee63e47d9b53c2d8f467e70ad6fd3f994b3e8721dabed21114500d48 · sha256:7dd5cd60613314eb… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:mtrudel:bandit:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.Bandit.Pipeline'"],"packageName":"bandit","packageURL":"pkg:hex/bandit","product":"bandit","programFiles":["lib/bandit/pipeline.ex"],"programRoutines":[{"name":"'Elixir.Bandit.Pipeline':determine_scheme/2"}],"repo":"https://github.com/mtrudel/bandit","vendor":"mtrudel","versions":[{"lessThan":"1.11.0","status":"affected","version":"1.0.0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b1c23db4ee63e47d9b53c2d8f467e70ad6fd3f994b3e8721dabed21114500d48 · sha256:7dd5cd60613314eb… · /containers/cna/affected/0
{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:mtrudel:bandit:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.Bandit.Pipeline'"],"packageName":"mtrudel/bandit","packageURL":"pkg:github/mtrudel/bandit","product":"bandit","programFiles":["lib/bandit/pipeline.ex"],"programRoutines":[{"name":"'Elixir.Bandit.Pipeline':determine_scheme/2"}],"repo":"https://github.com/mtrudel/bandit","vendor":"mtrudel","versions":[{"lessThan":"45feea20dea8af7ffd7245271107b695c040e667","status":"affected","version":"ff2f829326cd5dcf7335939aef9775269d881e28","versionType":"git"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b1c23db4ee63e47d9b53c2d8f467e70ad6fd3f994b3e8721dabed21114500d48 · sha256:7dd5cd60613314eb… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":6.3,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:b1c23db4ee63e47d9b53c2d8f467e70ad6fd3f994b3e8721dabed21114500d48 · sha256:7dd5cd60613314eb… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-807","description":"CWE-807 Reliance on Untrusted Inputs in a Security Decision","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:b1c23db4ee63e47d9b53c2d8f467e70ad6fd3f994b3e8721dabed21114500d48 · sha256:7dd5cd60613314eb… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"tags":["related"],"url":"https://cna.erlef.org/cves/CVE-2026-39807.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b1c23db4ee63e47d9b53c2d8f467e70ad6fd3f994b3e8721dabed21114500d48 · sha256:7dd5cd60613314eb… · /containers/cna/references/1
{"tags":["patch"],"url":"https://github.com/mtrudel/bandit/commit/45feea20dea8af7ffd7245271107b695c040e667"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b1c23db4ee63e47d9b53c2d8f467e70ad6fd3f994b3e8721dabed21114500d48 · sha256:7dd5cd60613314eb… · /containers/cna/references/3
{"tags":["vendor-advisory","related"],"url":"https://github.com/mtrudel/bandit/security/advisories/GHSA-375f-4r2h-f99j"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b1c23db4ee63e47d9b53c2d8f467e70ad6fd3f994b3e8721dabed21114500d48 · sha256:7dd5cd60613314eb… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/mtrudel/bandit/security/advisories/GHSA-375f-4r2h-f99j"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b1c23db4ee63e47d9b53c2d8f467e70ad6fd3f994b3e8721dabed21114500d48 · sha256:7dd5cd60613314eb… · /containers/adp/0/references/0
{"tags":["related"],"url":"https://osv.dev/vulnerability/EEF-CVE-2026-39807"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b1c23db4ee63e47d9b53c2d8f467e70ad6fd3f994b3e8721dabed21114500d48 · sha256:7dd5cd60613314eb… · /containers/cna/references/2

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

← Back to CVE Explorer