CASCACascade Atlas

Evidence dossier

CVE-2025-3248

Langflow < 1.3.0 Unauthenticated RCE via /api/v1/validate/code

84.5–99.5Priority evidence range
As known Jul 19, 2026, 5:00 AM UTCgen-56ccdaf9

Normalized restatement

Langflow versions prior to 1.3.0 are susceptible to code injection in the /api/v1/validate/code endpoint. A remote and unauthenticated attacker can send crafted HTTP requests to execute arbitrary code.

State
PUBLISHED
Published
Apr 7, 2025
Updated
Jul 14, 2026
Evidence coverage
85%
CISA KEVCatalog member

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

FIRST EPSS99.99%

2026-07-18 · v2026.06.15 · percentile 100.0%

Source stateNo scored conflict

Distinct CVSS assessments remain side by side; none are averaged.

Source comparison

Who said what

CISA-ADPindependent enrichment
container

CISA ADP Vulnrichment

VulnCheckoriginal assertion
container

Langflow < 1.3.0 Unauthenticated RCE via /api/v1/validate/code

CISA KEVoriginal assertion
observed_exploitation

Langflow Missing Authentication Vulnerability

FIRST EPSSoriginal assertion
model_probability

Probability 0.999900000000; percentile 0.999850000000

Applicability

Cited product scope

Trace impact →
langflow-ailangflow
[{"status": "affected", "version": "0", "lessThan": "1.3.0", "versionType": "semver"}]unknown
Unknown vendorUnknown product
cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:*; end excluding 1.3.0supported

Assessments

CVSS by origin

9.8
nvd@nist.govCVSS 3.1 · role PrimaryCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8
disclosure@vulncheck.comCVSS 3.1 · role SecondaryCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8
VulnCheckCVSS 3.1 · role unknownCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Limitations and unknowns

  • KEV membership is authoritative for the catalog, not proof of exposure in any environment.
  • EPSS is a dated model probability and not an individual-environment prediction.
  • Affected or fixed status applies only to the exact cited product and version scope; unresolved scope remains unknown.
  • NVD-carried upstream facts remain derivative and are not independent corroboration.
  • Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
  • NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
  • Factor D is unknown in Public Core because no accepted canonical mapping-obligation ledger is present.
  • Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.