Page generated: 09 Nov 2026, 10:07 UTC
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CVE-2026-9198

IBM Langflow OSS 1.0.0 through 1.10.0 allows unauthenticated attackers to chain /api/v1/auto_login (mints SUPERUSER tokens to any network caller) with /api/v1/validate/code (executes user code via exec()) to achieve full RCE on default Langflow deployments

CVSS 9.8 (CRITICAL) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
1.8/10
REALITY · THREAT PRIORITY
8.6/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 9.8: +1.47
  • Fresh EPSS: 28.66%: +0.14

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 11 documents and public datasets.

Hype components

Headline sample (25%)
60/100
Press, 30 days (60%)
5/100
Grounded branding (15%)
0/100
HYPE TOTAL18/100

Sources and documents

OrcaRouter
Press · 30 Oct 2026, 06:07 · Langflow CVE-2026-9198: unauthenticated RCE added to KEV - OrcaRouter
Recorded Future
Press · 08 Sep 2026, 07:00 · August 2026 CVE Landscape - Recorded Future
Recorded Future
Press · 08 Sep 2026, 07:00 · Panorama des CVE d'août 2026​​ - Recorded Future
Forkast News
Press · 09 Aug 2026, 07:00 · Seven Critical CVEs in 18 Months: Langflow’s Architecture Is the Vulnerability - Forkast News
SecurityWeek
Press · 05 Aug 2026, 07:00 · CISA Warns of Exploited Langflow, N-central, and Tomcat Vulnerabilities - SecurityWeek
See all 11 source documents
The Register
Press · 05 Aug 2026, 07:00 · IBM's agentic AI platform is under active attack - patch now - The Register
Security Affairs
Press · 05 Aug 2026, 07:00 · U.S. CISA adds Langflow, Apache Tomcat, and N-able N-central flaws to its Known Exploited Vulnerabilities c... - Security Affairs
BleepingComputer
Press · 05 Aug 2026, 07:00 · CISA warns of hackers exploiting Langflow, N-central, Apache Tomcat flaws - BleepingComputer
The Hacker News
Press · 05 Aug 2026, 07:00 · CISA Flags Langflow RCE, Tomcat, and N-central Flaws as Actively Exploited - The Hacker News
Field Effect
Press · 05 Aug 2026, 07:00 · Langflow vulnerability chain under active exploitation - Field Effect
Forkast News
Press · 05 Aug 2026, 07:00 · Critical RCE in IBM Langflow Triggers CISA Emergency Deadline - Forkast News

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 1.8 · reality 8.6 (2026-11-02 15:14). The curve appears once the score changes.

Public exploit evidence

2

Public exploit entries / repo candidates

See 2 repos with metrics
RepositoryStarsForksLanguageUpdated
rmhowe425/PoC-CVE-2026-919810Python02 Sep 2026, 16:14
Riftweld/langflow-cve-2026-919800Python12 Oct 2026, 06:56
Public exploit evidence
Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence
Exploitation recorded
Priority basis
Recorded exploitation; CVSS 9.8; EPSS 28.7%
Attention, last 30 days
1 distinct story titles; 1 press documents; 1 publisher domains.
Technical potential
network access, no prior privileges, no user interaction.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 14:00:31.581372+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
Published
17 Jul 2026, 17:36
Added to the CISA KEV catalog
04 Aug 2026, 00:00
First press mention
05 Aug 2026, 07:00
Latest press mention
30 Oct 2026, 06:07
Score calculated
05 Nov 2026, 14:00
PoCs on GitHub
2 repositories