CVE-2026-23953

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

0.49% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 41.8% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Analyzed. 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

2026-01-22 21:39Z9 MO AGO

Last updated

2026-01-26 21:00Z9 MO AGO

Reserved

2026-01-19

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

High (CVSS 8.7)

CNA CVSS vector

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

Weaknesses

• CWE-93Improper Neutralization of CRLF Sequences ('CRLF Injection')Base

Data version

5.2

Document digest

9412085e34435c5652d30420a2ad36cd31f322e3debdef7c96332eba5e34b9da

• github.comhttps://github.com/lxc/incus/security/advisories/GHSA-x6jc-phwx-hp32x_refsource_CONFIRM
• github.comhttps://github.com/lxc/incus/blob/HEAD/internal/server/instance/drivers/driver_lxc.go#L1081x_refsource_MISC
• github.comhttps://github.com/user-attachments/files/24473682/environment_newline_injection.shx_refsource_MISC
• github.comhttps://github.com/user-attachments/files/24473685/environment_newline_injection.patchx_refsource_MISC