CVE-2026-18477

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 ImpactpartialSuccessful exploitation gives limited 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

0.08% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 0.2% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-09-01.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

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

2026-08-03 15:34Z1 MO AGO

Last updated

2026-09-01 14:15Z3 DAYS AGO

Reserved

2026-07-31

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Medium (CVSS 4.4)

CNA CVSS vector

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

Weaknesses

• CWE-367Time-of-check Time-of-use (TOCTOU) Race ConditionBase

Data version

5.2

Document digest

e6398416deb76732c685a5743e1fd78dfb5e17d73c9e57d21c01d1c4afca851b

• access.redhat.comRHSA-2026:49361https://access.redhat.com/errata/RHSA-2026:49361vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2026:61581https://access.redhat.com/errata/RHSA-2026:61581vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2026:61586https://access.redhat.com/errata/RHSA-2026:61586vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2026:61783https://access.redhat.com/errata/RHSA-2026:61783vendor-advisoryx_refsource_REDHAT
• access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-18477vdb-entryx_refsource_REDHAT
• bugzilla.redhat.comRHBZ#2509735https://bugzilla.redhat.com/show_bug.cgi?id=2509735issue-trackingx_refsource_REDHAT