# CVE-2026-13777 — Google Chrome

> As of 2026-07-02, CVE-2026-13777 is a HIGH-severity vulnerability in Google Chrome, CVSS v3.1 8.8, EPSS 0.3% (22.9th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-13777, most recently “Chrome 151 Security Update Patches 382 Vulnerabilities, Including 15 Critical Memory-Corruption Flaws (CVE-2026-13774 to CVE-2026-13788)”.

**Last updated:** 2026-07-02

## What is CVE-2026-13777?

Insufficient validation of untrusted input in iOSWeb in Google Chrome on iOS prior to 150.0.7871.47 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: Critical)

The record classifies CVE-2026-13777 under weakness class [CWE-20](https://intel.threadlinqs.com/cwe/CWE-20). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs a user to take an action first, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 102 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 8.8 — HIGH (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **EPSS (FIRST):** 0.3% probability of exploitation in the next 30 days, higher than 22.9% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 5.3/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-06-30, last modified 2026-07-02

## Is CVE-2026-13777 being exploited?

It currently carries a trending score of 15 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [Google](https://intel.threadlinqs.com/vendors/google): Chrome

## How to fix CVE-2026-13777

Vendor advisory: [https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_0175352312.html](https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_0175352312.html). Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.

## Threat activity tracking CVE-2026-13777

1 tracked threat in the Threadlinqs corpus references CVE-2026-13777, either in the campaign’s CVE list or as an indicator on the campaign record.

- [Chrome 151 Security Update Patches 382 Vulnerabilities, Including 15 Critical Memory-Corruption Flaws (CVE-2026-13774 to CVE-2026-13788)](https://intel.threadlinqs.com/threat/TL-2026-1026) — CRITICAL · 2026-07-01

## Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-10-10. This product uses the NVD API but is not endorsed or certified by the NVD.

**Other references**

- [chromereleases.googleblog.com](https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_0175352312.html)
- [issues.chromium.org](https://issues.chromium.org/issues/513128566)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-13777
Full detection coverage and IOCs for threats exploiting CVE-2026-13777 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp