How severe is CVE-2026-48616?

CVE-2026-48616 has a CVSS 3.x base score of 9.3, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.

Is CVE-2026-48616 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-2026-48616?

CVE-2026-48616 affects Rocket.chat. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-48616?

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

Does CVE-2026-48616 have an EU (EUVD) identifier?

Yes. CVE-2026-48616 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37514.

When was CVE-2026-48616 published?

CVE-2026-48616 was published on 2026-06-17 and last updated on 2026-06-18.

CVE-2026-48616

CVE-2026-48616 is a critical-severity vulnerability in Rocket.chat with a CVSS 3.x base score of 9.3. 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-284.

Key facts

Severity: Critical (CVSS 3.x base score 9.3)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-37514
Weakness: CWE-284
Affected product: Rocket.chat
Published: 2026-06-17
Last modified: 2026-06-18

Description

Rocket.Chat versions <8.5.1, 8.4.4, 8.3.6, 8.2.6, 8.1.6, 8.0.7, 7.13.9, 7.10.13 has an access control vulnerability in Livechat files. Protected file downloads at /file-upload/:fileId/:name authorize livechat access using rc_room_type=l with rc_rid+rc_token, but the authorization path does not verify that rc_rid matches the requested file's rid. Furthermore, :fileId is predictable via sequential MongoDB IDs, and :name can be anything, allowing unauthenticated discovery of all uploaded files.

Frequently asked questions

What is CVE-2026-48616?: Rocket.Chat versions <8.5.1, 8.4.4, 8.3.6, 8.2.6, 8.1.6, 8.0.7, 7.13.9, 7.10.13 has an access control vulnerability in Livechat files. Protected file downloads at /file-upload/:fileId/:name authorize livechat access using rc_room_type=l with rc_rid+rc_token, but the authorization path does not verify that rc_rid matches the requested file's rid. Furthermore, :fileId is predictable via sequential MongoDB IDs, and :name can be anything, allowing unauthenticated discovery of all uploaded files.
How severe is CVE-2026-48616?: CVE-2026-48616 has a CVSS 3.x base score of 9.3, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.
Is CVE-2026-48616 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-2026-48616?: CVE-2026-48616 affects Rocket.chat. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-48616?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-48616 have an EU (EUVD) identifier?: Yes. CVE-2026-48616 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37514.
When was CVE-2026-48616 published?: CVE-2026-48616 was published on 2026-06-17 and last updated on 2026-06-18.

References

Affected products (1)

cpe:2.3:a:rocket.chat:rocket.chat:*:*:*:*:*:*:*:*

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