CVE-2026-5903
published 2026-04-08CVE-2026-5903: Policy bypass in IFrameSandbox in Google Chrome prior to 147.0.7727.55 allowed a remote attacker who convinced a user to engage in specific UI gestures to…
PriorityP433medium6.5CVSS 3.1
AVNACLPRNUIRSUCNIHAN
EPSS
0.26%
17.8th percentile
Policy bypass in IFrameSandbox in Google Chrome prior to 147.0.7727.55 allowed a remote attacker who convinced a user to engage in specific UI gestures to bypass navigation restrictions via a crafted HTML page. (Chromium security severity: Low)
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | chromium | < chromium 147.0.7727.55-1 (sid) | chromium 147.0.7727.55-1 (sid) |
| chrome | < 147.0.7727.55 | 147.0.7727.55 | |
| chrome | >= 147.0.7727.55 < 147.0.7727.55 | 147.0.7727.55 | |
| chrome_chrome | — | — |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
osv6.5MEDIUM
vendor_debian6.5MEDIUM
vendor_redhat6.5MEDIUM
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: Policy bypass in IFrameSandbox
vendor_redhat·2026-04-07·CVSS 6.5
CVE-2026-5903 [MEDIUM] CWE-838 chromium-browser: Policy bypass in IFrameSandbox
chromium-browser: Policy bypass in IFrameSandbox
A policy bypass flaw was found in the IFrameSandbox component of the Chromium browser.
Upstream bug(s):
https://code.google.com/p/chromium/issues/detail?id=483771899
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-2026-5903
vendor_chrome·2026-04-07·CVSS 6.5
CVE-2026-5903 [LOW] Stable Channel Update for Desktop: CVE-2026-5903
Stable Channel Update for Desktop
CVE-2026-5903: Policy bypass in IFrameSandbox. Reported by @Ciarands on 2026-02-11 [TBD][ 483851888 ] Low CVE-2026-5904: Use after free in V8
Reported by Zhenpeng (Leo) Lin at depthfirst on 2026-02-12 [TBD][ 483899628 ] Low CVE-2026-5905: Incorrect security UI in Permissions
Severity: low
Debian
CVE-2026-5903: chromium - Policy bypass in IFrameSandbox in Google Chrome prior to 147.0.7727.55 allowed a...
vendor_debian·2026·CVSS 6.5
CVE-2026-5903 [MEDIUM] CVE-2026-5903: chromium - Policy bypass in IFrameSandbox in Google Chrome prior to 147.0.7727.55 allowed a...
Policy bypass in IFrameSandbox in Google Chrome prior to 147.0.7727.55 allowed a remote attacker who convinced a user to engage in specific UI gestures to bypass navigation restrictions via a crafted HTML page. (Chromium security severity: Low)
Scope: local
bookworm: open
bullseye: open
forky: open
sid: resolved (fixed in 147.0.7727.55-1)
trixie: open
VulDB
Google Chrome up to 146.0.7680.178 IFrameSandbox access control (ID 483771 / Nessus ID 305691)
vuldb·2026-04-13·CVSS 6.5
CVE-2026-5903 [MEDIUM] Google Chrome up to 146.0.7680.178 IFrameSandbox access control (ID 483771 / Nessus ID 305691)
A vulnerability classified as critical has been found in Google Chrome. The affected element is an unknown function of the component IFrameSandbox. Performing a manipulation results in improper access controls.
This vulnerability is cataloged as CVE-2026-5903. It is possible to initiate the attack remotely. There is no exploit available.
It is recommended to upgrade the affected component.
GHSA
GHSA-c9xc-4327-hw8j: Policy bypass in IFrameSandbox in Google Chrome prior to 147
ghsa_unreviewed·2026-04-09
CVE-2026-5903 GHSA-c9xc-4327-hw8j: Policy bypass in IFrameSandbox in Google Chrome prior to 147
Policy bypass in IFrameSandbox in Google Chrome prior to 147.0.7727.55 allowed a remote attacker who convinced a user to engage in specific UI gestures to bypass navigation restrictions via a crafted HTML page. (Chromium security severity: Low)
OSV
CVE-2026-5903: Policy bypass in IFrameSandbox in Google Chrome prior to 147
osv·2026-04-08·CVSS 6.5
CVE-2026-5903 [MEDIUM] CVE-2026-5903: Policy bypass in IFrameSandbox in Google Chrome prior to 147
Policy bypass in IFrameSandbox in Google Chrome prior to 147.0.7727.55 allowed a remote attacker who convinced a user to engage in specific UI gestures to bypass navigation restrictions via a crafted HTML page. (Chromium security severity: Low)
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-5903 chromium-browser: Policy bypass in IFrameSandbox
bugzilla·2026-04-08·CVSS 6.5
CVE-2026-5903 [MEDIUM] CVE-2026-5903 chromium-browser: Policy bypass in IFrameSandbox
CVE-2026-5903 chromium-browser: Policy bypass in IFrameSandbox
Policy bypass in IFrameSandbox in Google Chrome prior to 147.0.7727.55 allowed a remote attacker who convinced a user to engage in specific UI gestures to bypass navigation restrictions via a crafted HTML page. (Chromium security severity: Low)
Sans Isc
Microsoft Patch Tuesday April 2026., (Tue, Apr 14th)
blogs_sans_isc·2026-04-14·CVSS 8.8
[HIGH] Microsoft Patch Tuesday April 2026., (Tue, Apr 14th)
Microsoft Patch Tuesday April 2026.
Published: 2026-04-14. Last Updated: 2026-04-14 17:46:09 UTC
by Johannes Ullrich (Version: 1)
0 comment(s)
This month's Microsoft Patch Tuesday looks like a record one, but let's look at it a bit closer to understand what is happening
The update patches a total of 243 vulnerabilities. However, 78 of them are Chromium issues affecting Microsoft Edge. Patches for Edge were released earlier. This leaves 165 vulnerabilities that are not Edge-related. Of these, 8 are rated critical, and 154 are important. One vulnerability has already been exploited, and another was made public before today but has not yet been seen in the wild.
Noteworthy Vulnerabilities:
CVE-2026-33827 (Windows TCP/IP Remote Code Execution Vulnerability): As a packet nerd, I love thes
Wiz
CVE-2026-5903 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 8.8
CVE-2026-5903 [HIGH] CVE-2026-5903 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2026-5903 :
Google Chrome vulnerability analysis and mitigation
Policy bypass in IFrameSandbox in Google Chrome prior to 147.0.7727.55 allowed a remote attacker who convinced a user to engage in specific UI gestures to bypass navigation restrictions via a crafted HTML page. (Chromium security severity: Low)
Source : NVD
Published April 8, 2026
CNA Score N/A
Affected Technologies
Google Chrome
Chromium
Has Public Exploit No
Has CISA KEV Exploit No
CISA KEV Release Date N/A
CISA KEV Due Date N/A
Exploitation Probability Percentile (EPSS) 3.5
Exploitation Probability (EPSS) N/A
Affected packages and libraries
chromium
cpe:2.3:a:google:chrome
Sources
NVD
Debian 11, 12, 13, 14 No Fix Added at: Apr 09, 2026
Echo No Fix Added at: Apr 09, 2026
Linux Has Fix Added at: A
2026-04-08
Published