CVE-2026-59825

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.35% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 27.3% of scored records. A rank, not a probability.

NVD base score

7.4 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Received. NVD last modified this record on 2026-08-18.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-08-18 15:07Z17 DAYS AGO

Last updated

2026-08-18 15:51Z17 DAYS AGO

Reserved

2026-07-07

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

High (CVSS 7.4)

CNA CVSS vector

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

Weaknesses

• CWE-295Improper Certificate ValidationBase

Data version

5.2

Document digest

ce777855c68eceb13245aff83a752c4d134d645c5eeef72e2025a0b40a2e3688

• github.comhttps://github.com/mastodon/mastodon/security/advisories/GHSA-3rhr-8phh-jm86x_refsource_CONFIRM
• github.comhttps://github.com/mastodon/mastodon/pull/39571x_refsource_MISC
• github.comhttps://github.com/mastodon/mastodon/commit/2ccb6ef277e725d1932295690cf8ab9d3dc03149x_refsource_MISC
• github.comhttps://github.com/mastodon/mastodon/commit/5748d0b16ea09001e0933f76c7afe814e09652efx_refsource_MISC
• github.comhttps://github.com/mastodon/mastodon/commit/761c61b42590a2fd91442fc15a0a7583e48bbea4x_refsource_MISC
• github.comhttps://github.com/mastodon/mastodon/releases/tag/v4.4.19x_refsource_MISC
• github.comhttps://github.com/mastodon/mastodon/releases/tag/v4.5.12x_refsource_MISC