How severe is CVE-2026-27793?

CVE-2026-27793 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-2026-27793 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-27793?

CVE-2026-27793 affects Seerr. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-27793?

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

Does CVE-2026-27793 have an EU (EUVD) identifier?

Yes. CVE-2026-27793 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9055.

When was CVE-2026-27793 published?

CVE-2026-27793 was published on 2026-02-27 and last updated on 2026-06-17.

CVE-2026-27793

CVE-2026-27793 is a medium-severity vulnerability in Seerr 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-639.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (14th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-9055
Weakness: CWE-639
Affected product: Seerr
Published: 2026-02-27
Last modified: 2026-06-17

Description

Seerr is an open-source media request and discovery manager for Jellyfin, Plex, and Emby. Prior to version 3.1.0, the `GET /api/v1/user/:id` endpoint returns the full settings object for any user, including Pushover, Pushbullet, and Telegram credentials, to any authenticated requester regardless of their privilege level. This vulnerability can be exploited alone or combined with the reported unauthenticated account creation vulnerability, CVE-2026-27707. When combined, the two vulnerabilities create a zero-prior-access chain that leaks third-party API credentials for all users, including administrators. Version 3.1.0 contains a fix for both this vulnerability and for CVE-2026-27707.

Frequently asked questions

What is CVE-2026-27793?: Seerr is an open-source media request and discovery manager for Jellyfin, Plex, and Emby. Prior to version 3.1.0, the `GET /api/v1/user/:id` endpoint returns the full settings object for any user, including Pushover, Pushbullet, and Telegram credentials, to any authenticated requester regardless of their privilege level. This vulnerability can be exploited alone or combined with the reported unauthenticated account creation vulnerability, CVE-2026-27707. When combined, the two vulnerabilities create a zero-prior-access chain that leaks third-party API credentials for all users, including administrators. Version 3.1.0 contains a fix for both this vulnerability and for CVE-2026-27707.
How severe is CVE-2026-27793?: CVE-2026-27793 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-2026-27793 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-27793?: CVE-2026-27793 affects Seerr. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-27793?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-27793 have an EU (EUVD) identifier?: Yes. CVE-2026-27793 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9055.
When was CVE-2026-27793 published?: CVE-2026-27793 was published on 2026-02-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:seerr:seerr:*:*:*:*:*:*:*:*

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CVE-2026-27707 — High (CVSS 7.3): Seerr is an open-source media request and discovery manager for Jellyfin, Plex, and Emby. Starting in version 2.0.0 and…
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