How severe is CVE-2026-22218?

CVE-2026-22218 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-22218 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-22218?

CVE-2026-22218 affects Chainlit. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-22218?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-22218 have an EU (EUVD) identifier?

Yes. CVE-2026-22218 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3345.

When was CVE-2026-22218 published?

CVE-2026-22218 was published on 2026-01-20 and last updated on 2026-06-17.

CVE-2026-22218

CVE-2026-22218 is a medium-severity vulnerability in Chainlit with a CVSS 3.x base score of 6.5. 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-22.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v4: 7.1
EPSS exploit prediction: 9% (95th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-3345
Weakness: CWE-22
Affected product: Chainlit
Published: 2026-01-20
Last modified: 2026-06-17

Description

Chainlit versions prior to 2.9.4 contain an arbitrary file read vulnerability in the /project/element update flow. An authenticated client can send a custom Element with a user-controlled path value, causing the server to copy the referenced file into the attacker’s session. The resulting element identifier (chainlitKey) can then be used to retrieve the file contents via /project/file/<chainlitKey>, allowing disclosure of any file readable by the Chainlit service.

Frequently asked questions

What is CVE-2026-22218?: Chainlit versions prior to 2.9.4 contain an arbitrary file read vulnerability in the /project/element update flow. An authenticated client can send a custom Element with a user-controlled path value, causing the server to copy the referenced file into the attacker’s session. The resulting element identifier (chainlitKey) can then be used to retrieve the file contents via /project/file/<chainlitKey>, allowing disclosure of any file readable by the Chainlit service.
How severe is CVE-2026-22218?: CVE-2026-22218 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-22218 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-22218?: CVE-2026-22218 affects Chainlit. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-22218?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-22218 have an EU (EUVD) identifier?: Yes. CVE-2026-22218 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3345.
When was CVE-2026-22218 published?: CVE-2026-22218 was published on 2026-01-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:chainlit:chainlit:*:*:*:*:*:*:*:*

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