--- title: "cPanel Security Release: Targeted Patch Deployed September 22, 2026" description: "InMotion Hosting is tracking a cPanel security release that went out today, September 22, 2026. According to cPanel, the release patches multiple vulnerabilities that affect cPanel & WHM (Web Host Man..." url: https://www.inmotionhosting.com/support/news/2026-cpanel-security-response/cpanel-security-release-september-2026/ date: 2026-09-22 modified: 2026-09-22 author: "Derrell" categories: ["2026 cPanel Security Response"] type: post lang: en --- # cPanel Security Release: Targeted Patch Deployed September 22, 2026 TL;DR (AI Generated) According to cPanel, the release patches multiple vulnerabilities that affect cPanel & WHM (Web Host Manager) versions 120 and later, with severity up to Critical. cPanel reports no known exploits or proof-of-concept code in the wild at this time. cPanel has listed patched builds for versions 134, 136, and 138 so far. As of publication, cPanel has not published the full technical advisory or the Common Vulnerabilities and Exposures (CVE) identifiers, so the exact number and nature of the vulnerabilities are not public yet. cPanel reports that it distributes the patch through its standard automatic update process, and it strongly recommends a manual update once the build is available for your server's release tier. cPanel's public changelog already shows today's build for several branches, each logged as a "Targeted Security Release":. If is pinned to a specific build number, or to a version below 120, check with cPanel or InMotion Solutions before updating. cPanel strongly recommends a cPanel-provided release tier (LTS, STABLE, RELEASE, CURRENT, or EDGE) instead of a fixed build number, because custom version numbers often become out of date. Basic summary InMotion Hosting is tracking a cPanel security release that went out today, September 22, 2026. According to cPanel, the release patches multiple vulnerabilities that affect cPanel & WHM (Web Host Manager) versions 120 and later, with severity up to Critical. cPanel reports no known exploits or proof-of-concept code in the wild at this time. cPanel has listed patched builds for versions 134, 136, and 138 so far. InMotion Hosting is rolling out the patch to Shared, Reseller, and WordPress Hosting servers now, so customers on those plans do not need to take any action. Customers with root access on a VPS or Dedicated server should read on for the update path. ## What We Know About the cPanel Security Release According to cPanel, the vulnerabilities patched today were either disclosed responsibly by outside security researchers or found internally by cPanel’s security team. As of publication, cPanel has not published the full technical advisory or the Common Vulnerabilities and Exposures (CVE) identifiers, so the exact number and nature of the vulnerabilities are not public yet. cPanel reports that it distributes the patch through its standard automatic update process, and it strongly recommends a manual update once the build is available for your server’s release tier. cPanel’s public changelog already shows today’s build for several branches, each logged as a “Targeted Security Release”: - Version 134: build 134.0.57, dated September 22, 2026 - Version 136: build 136.0.41, dated September 22, 2026 - Version 138: build 138.0.8, dated September 22, 2026 **Note:** cPanel has listed patched builds for versions 134, 136, and 138 so far. That does not mean earlier supported versions are safe, and it does not mean they are unpatched either. It only means a same-day build has not appeared in the public changelog yet. InMotion Hosting will update this article with confirmed build numbers, CVE identifiers, and a link to cPanel’s official advisory for every affected version as soon as cPanel publishes them. ## What This Means for Your Hosting ### Shared, Reseller, and WordPress Hosting These plans run on InMotion Hosting’s [cPanel Long Term Support (LTS) tier](/support/news/cpanel-v134-lts-upgrade-schedule/), currently version 134. InMotion Hosting manages cPanel updates on these servers, so you do not need to do anything. InMotion Hosting began applying the patch across these servers on September 22, 2026. The rollout reaches servers in stages, so your account may update at a different time than others. ### VPS and Dedicated servers Most InMotion Hosting VPS and Dedicated servers follow cPanel’s RELEASE tier, not LTS. The RELEASE tier now delivers the patched 138.0.8 build. These servers receive cPanel updates through the nightly `upcp` cron job by default. If you have not disabled or pinned updates, your server picks up the new build on its own. If you have root or WHM access and manage your own update settings, check your current version and update manually rather than waiting for the next scheduled run. If you have a Managed VPS or Managed Dedicated server, InMotion Solutions can review your update configuration and apply the patch for you. Reach out through your [Account Management Panel (AMP)](https://secure1.inmotionhosting.com/amp) to request help. ## What You Should Do If you manage your own VPS or Dedicated server, confirm your cPanel & WHM version and update it manually if the automatic cron has not run yet. Log in over [Secure Shell (SSH)](/support/server/ssh/how-to-login-ssh/) or open WHM’s Terminal interface as root. WHM shows your installed version in the top right corner of the interface, or you can check it with this command: ``` /usr/local/cpanel/cpanel -V ``` Next, review `/etc/cpupdate.conf`. The `CPANEL=` line sets your release tier or a pinned version, and the `UPDATES=` line controls whether updates apply automatically. If `UPDATES=` is set to `manual` or `never`, the nightly cron will not apply this patch for you. If `CPANEL=` is pinned to a specific build, automatic updates will not apply it either (see the Important note later in this section). To update now, run this command over SSH or in WHM’s Terminal: ``` /scripts/upcp ``` Run `/usr/local/cpanel/cpanel -V` again afterward to confirm the build number matches or exceeds today’s release for your tier: 138.0.8 on RELEASE, 136.0.41 on STABLE, or 134.0.57 on LTS. **Important:** `/scripts/upcp` installs the most recent build available on your server’s configured release tier. If `CPANEL=` is pinned to a specific build number, or to a version below 120, check with cPanel or InMotion Solutions before updating. cPanel strongly recommends a cPanel-provided release tier (LTS, STABLE, RELEASE, CURRENT, or EDGE) instead of a fixed build number, because custom version numbers often become out of date. ## What Comes Next cPanel has said it will publish the full details of this release. As of publication, the CVE identifiers and cPanel’s official technical advisory are not public yet. InMotion Hosting will update this article with the patched build numbers for every affected version, the CVE identifiers, and a link to the advisory once cPanel publishes the full details of this cPanel security release. For the latest build numbers in the meantime, see the official [cPanel & WHM changelogs](https://docs.cpanel.net/changelogs/). 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