CVE-2026-7978
published 2026-05-06CVE-2026-7978: Inappropriate implementation in Companion in Google Chrome on Mac prior to 148.0.7778.96 allowed a remote attacker to perform OS-level privilege escalation via…
PriorityP348high8.1CVSS 3.1
AVNACHPRNUINSUCHIHAH
EPSS
0.24%
14.8th percentile
Inappropriate implementation in Companion in Google Chrome on Mac prior to 148.0.7778.96 allowed a remote attacker to perform OS-level privilege escalation via malicious network traffic. (Chromium security severity: Medium)
Affected
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| chrome | < 148.0.7778.96 | 148.0.7778.96 | |
| chrome | >= 148.0.7778.96 < 148.0.7778.96 | 148.0.7778.96 | |
| chrome_desktop | — | — |
CVSS provenance
nvdv3.18.1HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
vendor_redhat8.1HIGH
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
Red Hat
chromium-browser: Inappropriate implementation in Companion
vendor_redhat·2026-05-05·CVSS 8.1
CVE-2026-7978 [HIGH] CWE-266 chromium-browser: Inappropriate implementation in Companion
chromium-browser: Inappropriate implementation in Companion
An inappropriate implementation flaw was found in the Companion component of the Chromium browser.
Upstream bug(s):
https://code.google.com/p/chromium/issues/detail?id=497828892
Statement: Red Hat Product Security rates the severity of this flaw as determined by the Google Chrome Security Advisory.
Chrome
Stable Channel Update for Desktop: CVE-2026-7976
vendor_chrome·2026-05-05·CVSS 7.5
CVE-2026-7976 [MEDIUM] Stable Channel Update for Desktop: CVE-2026-7976
Stable Channel Update for Desktop
CVE-2026-7976: Use after free in Views. Reported by Google on 2026-03-30 [N/A][ 497821223 ] Medium CVE-2026-7977: Inappropriate implementation in Canvas
Reported by Google on 2026-03-30 [N/A][ 497828892 ] Medium CVE-2026-7978: Inappropriate implementation in Companion
Severity: medium
VulDB
Google Chrome up to 147.0.7727.138 on macOS Companion Remote Code Execution
vuldb·2026-05-06·CVSS 8.1
CVE-2026-7978 [HIGH] Google Chrome up to 147.0.7727.138 on macOS Companion Remote Code Execution
A vulnerability, which was classified as critical, has been found in Google Chrome on macOS. This affects an unknown part of the component Companion. The manipulation leads to Remote Code Execution.
This vulnerability is traded as CVE-2026-7978. It is possible to initiate the attack remotely. There is no exploit available.
It is advisable to upgrade the affected component.
GHSA
GHSA-vc4p-4fpj-c36p: Inappropriate implementation in Companion in Google Chrome on Mac prior to 148
ghsa_unreviewed·2026-05-06
CVE-2026-7978 [HIGH] CWE-693 GHSA-vc4p-4fpj-c36p: Inappropriate implementation in Companion in Google Chrome on Mac prior to 148
Inappropriate implementation in Companion in Google Chrome on Mac prior to 148.0.7778.96 allowed a remote attacker to perform OS-level privilege escalation via malicious network traffic. (Chromium security severity: Medium)
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-7978 chromium-browser: Inappropriate implementation in Companion
bugzilla·2026-05-06·CVSS 8.1
CVE-2026-7978 [HIGH] CVE-2026-7978 chromium-browser: Inappropriate implementation in Companion
CVE-2026-7978 chromium-browser: Inappropriate implementation in Companion
Inappropriate implementation in Companion in Google Chrome on Mac prior to 148.0.7778.96 allowed a remote attacker to perform OS-level privilege escalation via malicious network traffic. (Chromium security severity: Medium)
Rapid7
Patch Tuesday - May 2026
blogs_rapid7·2026-05-13·CVSS 10.0
CVE-2026-41089 [CRITICAL] Patch Tuesday - May 2026
Microsoft is publishing 137 vulnerabilities on May 2026 Patch Tuesday . Microsoft is not aware of exploitation in the wild or public disclosure for any of these vulnerabilities. So far this month, Microsoft has provided patches to address 133 browser vulnerabilities, which are not included in the Patch Tuesday count above.
## Windows Netlogon: critical RCE
Anyone responsible for securing a domain controller should prioritize remediation of CVE-2026-41089 , which is a critical stack-based buffer overflow in Windows Netlogon with a CVSS v3 base score of 9.8. Exploitation leads to execution in the context of the Netlogon service, so that’s SYSTEM privileges on the domain controller. For most pentesters, that’s the point at which the customer report more or less writes itself. No privileges
2026-05-06
Published