CVE-2026-78949: Observable discrepancy in CustomTabs in Google Chrome on on Android prior to 152.0.7977.65 allowed a local att

Q: How do I fix CVE-2026-78949?

chrome: upgrade to 152.0.7977.65. Exact commands for each OS are on this page.

Q: Is CVE-2026-78949 being exploited?

CVE-2026-78949 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-78949 affect?

CVE-2026-78949 affects chrome. Severity is low (CVSS 2.9). Observable discrepancy in CustomTabs in Google Chrome on on Android prior to 152.0.7977.65 allowed a local attacker to obtain cross-origin data via a co-installed app. (Chromium security severity: Medium)

Q: How urgent is CVE-2026-78949?

Priority 10/100. No elevated risk signals yet.

Routine

LOW 2.9UPGRADE

CVE-2026-78949 is a low-severity flaw (CVSS 2.9) affecting chrome. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Observable discrepancy in CustomTabs in Google Chrome on on Android prior to 152.0.7977.65 allowed a local attacker to obtain cross-origin data via a co-installed app. (Chromium security severity: Medium)

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	2.9 (Low)
Attack vector	Local
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.1% (top 99%)
CISA exploited list	No
Weakness	CWE-203
Published	2026-08-25
Last modified	2026-08-31

Publisher (CNA): Chrome · Vendor: google

Last updated 2026-08-31 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-25 21:17 UTCPublished CVE record published
2026-08-31 18:58 UTCUpdated Record last modified

google chrome UPGRADE

Affected: < 152.0.7977.65

Fixed in: 152.0.7977.65

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy chrome || rpm -q chrome || chrome --version

2. UPGRADE to 152.0.7977.65 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade chrome

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade chrome

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-78949?

chrome: upgrade to 152.0.7977.65. Exact commands for each OS are on this page.

Is CVE-2026-78949 being exploited?

CVE-2026-78949 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-78949 affect?

CVE-2026-78949 affects chrome. Severity is low (CVSS 2.9). Observable discrepancy in CustomTabs in Google Chrome on on Android prior to 152.0.7977.65 allowed a local attacker to obtain cross-origin data via a co-installed app. (Chromium security severity: Medium)

How urgent is CVE-2026-78949?

Priority 10/100. No elevated risk signals yet.

Software pages

Android vulnerabilities · Google Chrome vulnerabilities · Chromium vulnerabilities

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References

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