How severe is CVE-2026-4503?

CVE-2026-4503 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-4503 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-4503?

CVE-2026-4503 affects Langflow Langflow Desktop. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-4503?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-4503 have an EU (EUVD) identifier?

Yes. CVE-2026-4503 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26435.

When was CVE-2026-4503 published?

CVE-2026-4503 was published on 2026-04-30 and last updated on 2026-06-17.

CVE-2026-4503

CVE-2026-4503 is a high-severity vulnerability in Langflow Langflow Desktop with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-639.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-26435
Weakness: CWE-639
Affected product: Langflow Langflow Desktop
Published: 2026-04-30
Last modified: 2026-06-17

Description

IBM Langflow Desktop 1.0.0 through 1.8.4 Langflow could allow an unauthenticated user to view other users' images due to an indirect object reference through a user-controlled key.

Frequently asked questions

What is CVE-2026-4503?: IBM Langflow Desktop 1.0.0 through 1.8.4 Langflow could allow an unauthenticated user to view other users' images due to an indirect object reference through a user-controlled key.
How severe is CVE-2026-4503?: CVE-2026-4503 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-4503 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-4503?: CVE-2026-4503 affects Langflow Langflow Desktop. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-4503?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-4503 have an EU (EUVD) identifier?: Yes. CVE-2026-4503 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26435.
When was CVE-2026-4503 published?: CVE-2026-4503 was published on 2026-04-30 and last updated on 2026-06-17.

References

https://www.ibm.com/support/pages/node/7271099

Affected products (1)

cpe:2.3:a:langflow:langflow_desktop:*:*:*:*:*:*:*:*

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