CVE-2026-33937

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.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• 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

1.70% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 75.5% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-09-04.

Red Hat severity

Important. 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

2026-03-27 21:03Z5 MO AGO

Last updated

2026-09-04 12:04Z7 HR AGO

Reserved

2026-03-24

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

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

Weaknesses

• CWE-94Improper Control of Generation of Code ('Code Injection')Base
• CWE-843Access of Resource Using Incompatible Type ('Type Confusion')Base

Data version

5.2

Document digest

41976d3886d3fc140948b787c8b43d34b864110f89ea622edb66c25906a16c77

• github.comhttps://github.com/handlebars-lang/handlebars.js/security/advisories/GHSA-2w6w-674q-4c4qx_refsource_CONFIRM
• github.comhttps://github.com/handlebars-lang/handlebars.js/commit/68d8df5a88e0a26fe9e6084c5c6aaebe67b07da2x_refsource_MISC
• github.comhttps://github.com/handlebars-lang/handlebars.js/releases/tag/v4.7.9x_refsource_MISC
• access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-33937vdb-entryx_refsource_REDHAT
• bugzilla.redhat.comRHBZ#2452523https://bugzilla.redhat.com/show_bug.cgi?id=2452523issue-trackingx_refsource_REDHAT
• security.access.redhat.comhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33937.jsonx_sadp-csaf-vex
• access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:34342vendor-advisoryx_refsource_REDHAT
• access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:10175vendor-advisoryx_refsource_REDHAT