Is CVE-2026-28505 in the CISA KEV catalog?

No. CVE-2026-28505 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-28505?

CVE-2026-28505 has a CVSS v3 base score of 10.0 (CRITICAL).

What is the EPSS score for CVE-2026-28505?

CVE-2026-28505 has an EPSS score of 0.48% (38th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-28505?

Upgrade Tautulli to 2.17.0 or later.

CVE & CISA-KEV Catalog

CVE-2026-28505

CRITICAL

10.0

CVSS v3

NVD

Description

Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Prior to version 2.17.0, the str_eval() function in notification_handler.py implements a sandboxed eval() for notification text templates. The sandbox attempts to restrict callable names by inspecting code.co_names of the compiled code object. However, co_names only contains names from the outer code object. When a lambda expression is used, it creates a nested code object whose attribute accesses are stored in code.co_consts, NOT in code.co_names. The sandbox never inspects nested code objects. This issue has been patched in version 2.17.0.

CWE-94Code Injection CWE-95

How to fix

Remediation Available

TautulliWindows application

Affected:2.17.0Fixed in:2.17.0Tautulli

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Exploit Intelligence

0.48%probability of exploitation in 30 days

38thpercentile

Low risk: more likely to be exploited than 38% of all known CVEs.

References

Exploit1

github.com

Release Notes1

github.com

Related Vulnerabilities

Other CWE-94 (Code Injection) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2017-9841	Critical	9.8	100%	KEV	Fix
CVE-2015-1635	Critical	9.8	100%	KEV	-
CVE-2022-22954	Critical	9.8	100%	KEV + Ransom	-
CVE-2025-3248	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2021-22204	Medium	6.8	100%	KEV	Fix
CVE-2012-0158	High	8.8	100%	KEV	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-02.