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CVE-2026-12822

MEDIUM 4.8 PoC AVAILABLE

Published 2026-06-21 · Last modified 2026-06-23

A vulnerability was identified in langflow-ai langflow up to 1.9.3. This affects an unknown function of the component Bundle URL Loader. The manipulation leads to code injection. The attack needs to be performed locally. The vendor was contacted early about this disclosure but did not respond in any way.

EXPLOIT AVAILABLE

Public exploit or PoC code exists. Modeled probability is still low, but the barrier to attack is reduced — watch closely.

Exploitation likelihood

0.2%chance of exploitation in 30 days · 9th percentile

○ In CISA KEV ● Public exploit / PoC

Impact if exploited

4.8CVSS 4.0 · MEDIUM

  • ConfidentialityLow
  • IntegrityLow
  • AvailabilityLow

What an attacker needs

  • ⚠Access: Requires local access to the host
  • ⚠Privileges: Requires a low-privilege account
  • ✓User interaction: No user interaction needed
  • ✓Complexity: No special conditions — reliably repeatable
  • ✓Requirements: No special attack requirements

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept & exploit code

Test against your own equipment

curl -s https://vulnpedia.com/cve/CVE-2026-12822/poc.jsonMachine-readable PoC index for this CVE (for automation).

Listed for defensive triage, patch verification, and authorized testing on systems you own. Machine-readable: /cve/CVE-2026-12822/poc.json

Affected

Vendors Langflow Ai Langflow

Products Langflow

Weakness (CWE)

  • CWE-94: Code Injection
  • CWE-74: Injection

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

Known Affected Software Configurations

VendorProductVersion range
LangflowLangflow< 1.9.3

All CVSS metrics

  • MEDIUM 4.8 v4.0 · CNA Primary
    CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
  • MEDIUM 5.3 v3.1 · CNA Primary
    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
  • MEDIUM 5.3 v3.0 · CNA Primary
    CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
  • MEDIUM 4.3 v2.0 · CNA Primary
    AV:L/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR
  • LOW 1.9 v4.0 · NVD Secondary
    CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  • MEDIUM 5.3 v3.1 · NVD Secondary
    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
  • HIGH 7.8 v3.1 · NVD Primary
    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • MEDIUM 4.3 v2.0 · NVD Secondary
    AV:L/AC:L/Au:S/C:P/I:P/A:P

References

Exploits & PoC

Advisories

Technical & other

Sources: NVD · CVE.org · EPSS