TI-2024-08611 Aliases CVE-2024-9277 GHSA-355v-2rjx-fpx7

Langflow HTTP POST Request utils.py redos

MEDIUM 56CWE-1333Published 2024-09-27 · Updated 2024-09-27

Key facts

Attack vector: Adjacent network
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · Low
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-1333.

Summary

A vulnerability classified as problematic was found in Langflow up to 1.0.18. Affected by this vulnerability is an unknown functionality of the file \src\backend\base\langflow\interface\utils.py of the component HTTP POST Request Handler. The manipulation of the argument remaining_text leads to inefficient regular expression complexity. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00963 61st percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA and NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	Langflow	1.0.0; 1.0.1; 1.0.2; 1.0.3; 1.0.4; 1.0.5; 1.0.6; 1.0.7; 1.0.8; 1.0.9; 1.0.10; 1.0.11; 1.0.12; 1.0.13; 1.0.14; 1.0.15; 1.0.16; 1.0.17; 1.0.18	—	No fix listed	CNA
—	langflow (PyPI)	up to 1.0.18	—	No fix listed	GHSA-355v-2rjx-fpx7

Langflow Vendor— Affected 1.0.0; 1.0.1; 1.0.2; 1.0.3; 1.0.4; 1.0.5; 1.0.6; 1.0.7; 1.0.8; 1.0.9; 1.0.10; 1.0.11; 1.0.12; 1.0.13; 1.0.14; 1.0.15; 1.0.16; 1.0.17; 1.0.18 Fixed in — No fix listed CNA
langflow (PyPI) Vendor— Affected up to 1.0.18 Fixed in — No fix listed GHSA-355v-2rjx-fpx7

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:langflow:langflow::::::::	up to 1.0.18	Vulnerable	Langflow

cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:* Versions up to 1.0.18 Vulnerable ·Langflow

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2024-9277
2026-10-03 Alias added: GHSA-355v-2rjx-fpx7

References

Exploit 1

https://rumbling-slice-eb0.notion.site/Remote-Redos-in-https-github-com-langflow-ai-langflow-067159ced0d5494e91b06071384969c4?pvs=4

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2024-9277

Other 2

TI-2026-08085 Unauthenticated Remote Code Execution via Auto-Login Bypass and Code Validation KEVCVSS 3.1CRITICAL 9.8
TI-2026-00553 Langflow exec_globals Inclusion of Functionality from Untrusted Control Sphere Remote… KEVCVSS 3.0CRITICAL 9.8
TI-2025-24427 Langflow <= 1.6.9 CORS Misconfiguration to Token Hijack & RCE KEVCVSS 4.0CRITICAL 9.4
TI-2025-02845 Langflow < 1.3.0 Unauthenticated RCE via /api/v1/validate/code KEVCVSS 3.1CRITICAL 9.8
TI-2026-25463 Langflow has Unauthenticated Remote Code Execution via Public Flow Build Endpoint KEVCVSS 4.0CRITICAL 9.3
TI-2026-39928 Authorization bypass in langflow KEVCVSS 3.1HIGH 8.4

See all 216 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences