CVE-2026-10129: Langflow OSS SSRF and privilege escalation (REPRO-2026-00240)

Pruva

Verified reproduction

CVE-2026-10129: Langflow OSS SSRF and privilege escalation

CVE-2026-10129 is verified against the affected target vulnerability class: SSRF This high reproduction includes runnable sandbox proof, artifacts, and a plain-text agent view under REPRO-2026-00240.

REPRO-2026-00240 SSRF Variant found Jul 6, 2026 .txt

Severity HIGH

Confidence HIGH

Reproduced in 56m 49s

Tool calls 446

Spend $15.88

01 · Reproduce

Download script Open in Codespaces → Variant script

$ pruva-verify REPRO-2026-00240

or

curl -O https://pruva.dev/api/v1/reproductions/REPRO-2026-00240/artifacts/bundle/repro/reproduction_steps.sh && chmod +x reproduction_steps.sh && ./reproduction_steps.sh

Run in a VM or disposable container. This exploits a real vulnerability.

02 · The vulnerability

IBM Langflow OSS 1.0.0 through 1.9.3 contains a Server-Side Request Forgery (SSRF) protection bypass that can be chained to escalate privileges. Reproduce: run Langflow OSS in an affected version, send a crafted API request that triggers an SSRF to an internal/admin endpoint, and observe unauthorized access or privilege escalation.

03 · Root cause

Variant analysis

04 · Reproduction transcript

The agent's step-by-step process — every tool call, every handoff, the moment the exploit fired. Phases: support triages the advisory · repro reproduces it · vuln_variant confirms the fix blocks it · judge verifies.

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05 · Artifacts

Scripts, logs, diffs, and output captured during the reproduction.

bundle/artifact_promotion_manifest.json12.2 KB

bundle/vuln_variant/source_identity.json1.2 KB

bundle/vuln_variant/root_cause_equivalence.json1.3 KB

bundle/logs/vuln_variant/latest_git_identity.txt0.1 KB

bundle/logs/vuln_variant/url_component_fix_diff_excerpt.txt11.5 KB

bundle/repro/reproduction_steps.sh16.4 KB

bundle/repro/rca_report.md10.3 KB

bundle/repro/runtime_manifest.json1.0 KB

bundle/repro/validation_verdict.json0.8 KB