Is CVE-2026-57953 in the CISA KEV catalog?

No. CVE-2026-57953 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-57953?

CVE-2026-57953 has a CVSS v3 base score of 5.4 (MEDIUM).

What is the EPSS score for CVE-2026-57953?

CVE-2026-57953 has an EPSS score of 0.25% (16th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-57953?

Upgrade mythic to 3.4.0.60 or later.

CVE & CISA-KEV Catalog

CVE-2026-57953

MEDIUM

5.4

CVSS v3

NVD

Description

Mythic before 3.4.0.60 contains an authorization bypass vulnerability that allows authenticated spectator-role users to perform unauthorized write operations by accessing the eventing_import_automatic_webhook endpoint registered under spectator-permitted middleware. Attackers with spectator role can exploit this misconfigured access control to create and delete automation workflows, making unauthorized modifications to operation automation configuration and EventGroups.

CWE-863Incorrect Authorization

How to fix

Remediation Available

mythicNVD

Affected:< 3.4.0.60Fixed in:3.4.0.60CVE-2026-57953derived from NVD

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 RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityLow

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

Exploit Intelligence

0.25%probability of exploitation in 30 days

16thpercentile

Low risk: more likely to be exploited than 16% of all known CVEs.

References

Patch1

github.com

Third-Party Advisory1

vulncheck.com

Issue Tracking1

github.com

Release Notes1

github.com

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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 2026-06-30.