Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability

published 2026-05-12 5 mo ago modified 2026-10-26 13 d ago also EUVD-2026-29714

cvss: 5.4; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 15%
public exploits: 0; none known

Improper neutralization of special elements in output used by a downstream component ('injection') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to elevate privileges over a network.

Patch / fix

fixed in 1 links 1

Microsoft Microsoft Edge (Chromium-based) 148.0.3967.55

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42838 advisory

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 5 mo ago (2026-05-13)

Exploit prediction

0.24% chance of exploitation in the next 30 days, higher than 15% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C
CNA	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Affected products

Microsoft Microsoft Edge (Chromium-based)

Classification

Weakness

CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component

References

msrc.microsoft.com /update-guide/vulnerability/CVE-2026-42838
vendor-advisory, patch

Sources

CVE List CVE-2026-42838
NVD CVE-2026-42838

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary