How severe is CVE-2026-30942?

CVE-2026-30942 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-2026-30942 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-30942?

CVE-2026-30942 affects Flintsh Flare. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-30942?

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

Does CVE-2026-30942 have an EU (EUVD) identifier?

Yes. CVE-2026-30942 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10553.

When was CVE-2026-30942 published?

CVE-2026-30942 was published on 2026-03-10 and last updated on 2026-06-17.

CVE-2026-30942

CVE-2026-30942 is a medium-severity vulnerability in Flintsh Flare 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: 8.3
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-10553
Weakness: CWE-22
Affected product: Flintsh Flare
Published: 2026-03-10
Last modified: 2026-06-17

Description

Flare is a Next.js-based, self-hostable file sharing platform that integrates with screenshot tools. Prior to 1.7.3, an authenticated path traversal vulnerability in /api/avatars/[filename] allows any logged-in user to read arbitrary files from within the application container. The filename URL parameter is passed to path.join() without sanitization, and getFileStream() performs no path validation, enabling %2F-encoded ../ sequences to escape the uploads/avatars/ directory and read any file accessible to the nextjs process under /app/. Authentication is enforced by Next.js middleware. However, on instances with open registration enabled (the default), any attacker can self-register and immediately exploit this. This vulnerability is fixed in 1.7.3.

Frequently asked questions

What is CVE-2026-30942?: Flare is a Next.js-based, self-hostable file sharing platform that integrates with screenshot tools. Prior to 1.7.3, an authenticated path traversal vulnerability in /api/avatars/[filename] allows any logged-in user to read arbitrary files from within the application container. The filename URL parameter is passed to path.join() without sanitization, and getFileStream() performs no path validation, enabling %2F-encoded ../ sequences to escape the uploads/avatars/ directory and read any file accessible to the nextjs process under /app/. Authentication is enforced by Next.js middleware. However, on instances with open registration enabled (the default), any attacker can self-register and immediately exploit this. This vulnerability is fixed in 1.7.3.
How severe is CVE-2026-30942?: CVE-2026-30942 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-2026-30942 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-30942?: CVE-2026-30942 affects Flintsh Flare. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-30942?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-30942 have an EU (EUVD) identifier?: Yes. CVE-2026-30942 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10553.
When was CVE-2026-30942 published?: CVE-2026-30942 was published on 2026-03-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:flintsh:flare:*:*:*:*:*:*:*:*

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