CVE-2026-66882

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 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

0.75% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 54.4% of scored records. A rank, not a probability.

NVD base score

2.1 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

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

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

2026-08-25 08:03Z2 MO AGO

Last updated

2026-08-25 19:51Z2 MO AGO

Reserved

2026-07-28

Assigning CNA

EEF

Record state

PUBLISHED

Severity

Low (CVSS 2.1)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Weaknesses

• CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Base

Data version

5.2

Document digest

702ee2e38ea5a9a5d88fc8086f4b3c1bbb5afb8f2ce4bc5f8013000c3f1dea0c

• github.comhttps://github.com/team-alembic/ash_authentication/security/advisories/GHSA-54fc-x3hv-ffhwvendor-advisoryrelated
• cna.erlef.orghttps://cna.erlef.org/cves/CVE-2026-66882.htmlrelated
• osv.devhttps://osv.dev/vulnerability/EEF-CVE-2026-66882related
• github.comhttps://github.com/team-alembic/ash_authentication/commit/62719710790a150a9eacab9c0a066e0d122d15bepatch
• github.comhttps://github.com/team-alembic/ash_authentication/commit/0bd5199db066be22b2ca1ec8bc6109e5d62e6070patch