How severe is CVE-2026-35584?

CVE-2026-35584 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-35584 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-35584?

CVE-2026-35584 affects Freescout. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-35584?

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

Does CVE-2026-35584 have an EU (EUVD) identifier?

Yes. CVE-2026-35584 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19734.

When was CVE-2026-35584 published?

CVE-2026-35584 was published on 2026-04-07 and last updated on 2026-06-17.

CVE-2026-35584

CVE-2026-35584 is a medium-severity vulnerability in Freescout 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-306.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v4: 6.9
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-19734
Weakness: CWE-306
Affected product: Freescout
Published: 2026-04-07
Last modified: 2026-06-17

Description

FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to 1.8.212, the endpoint GET /thread/read/{conversation_id}/{thread_id} does not require authentication and does not validate whether the given thread_id belongs to the given conversation_id. This allows any unauthenticated attacker to mark any thread as read by passing arbitrary IDs, enumerate valid thread IDs via HTTP response codes (200 vs 404), and manipulate opened_at timestamps across conversations (IDOR). This vulnerability is fixed in 1.8.212.

Frequently asked questions

What is CVE-2026-35584?: FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to 1.8.212, the endpoint GET /thread/read/{conversation_id}/{thread_id} does not require authentication and does not validate whether the given thread_id belongs to the given conversation_id. This allows any unauthenticated attacker to mark any thread as read by passing arbitrary IDs, enumerate valid thread IDs via HTTP response codes (200 vs 404), and manipulate opened_at timestamps across conversations (IDOR). This vulnerability is fixed in 1.8.212.
How severe is CVE-2026-35584?: CVE-2026-35584 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-35584 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-35584?: CVE-2026-35584 affects Freescout. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-35584?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-35584 have an EU (EUVD) identifier?: Yes. CVE-2026-35584 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19734.
When was CVE-2026-35584 published?: CVE-2026-35584 was published on 2026-04-07 and last updated on 2026-06-17.

References

https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-873c-r7v5-g98v

Affected products (1)

cpe:2.3:a:freescout:freescout:*:*:*:*:*:*:*:*

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