CVE-2023-38686

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• 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

0.26% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 18.2% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

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

2023-08-04 15:57Z3 YR AGO

Last updated

2024-10-08 17:50Z2 YR AGO

Reserved

2023-07-24

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Critical (CVSS 9.3)

CNA CVSS vector

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

Weaknesses

• CWE-295Improper Certificate ValidationBase

Data version

5.1

Document digest

fc952bc59e3076d1c84b3280ac9d1d035265a952582a957c31ff2b2b80075b87

• github.comhttps://github.com/matrix-org/sydent/security/advisories/GHSA-p6hw-wm59-3g5gx_refsource_CONFIRM
• github.comhttps://github.com/python/cpython/issues/91826x_refsource_MISC
• github.comhttps://github.com/matrix-org/sydent/pull/574x_refsource_MISC
• github.comhttps://github.com/matrix-org/sydent/commit/1cd748307c6b168b66154e6c4db715d4b9551261x_refsource_MISC
• docs.python.orghttps://docs.python.org/3/library/ssl.html?highlight=ssl#security-considerationsx_refsource_MISC
• github.comhttps://github.com/matrix-org/sydent/releases/tag/v2.5.6x_refsource_MISC
• peps.python.orghttps://peps.python.org/pep-0476/x_refsource_MISC