Is CVE-2026-1484 in the CISA KEV catalog?

No. CVE-2026-1484 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-1484?

CVE-2026-1484 has a CVSS v3 base score of 4.2 (MEDIUM).

What is the EPSS score for CVE-2026-1484?

CVE-2026-1484 has an EPSS score of 0.30% (22th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-1484?

Upgrade glib2.0 on debian 11 to 2.66.8-1+deb11u8 or later. Fixes are available for 5 affected products.

CVE & CISA-KEV Catalog

CVE-2026-1484

MEDIUM

4.2

CVSS v3

NVD

Description

A flaw was found in the GLib Base64 encoding routine when processing very large input data. Due to incorrect use of integer types during length calculation, the library may miscalculate buffer boundaries. This can cause memory writes outside the allocated buffer. Applications that process untrusted or extremely large Base64 input using GLib may crash or behave unpredictably.

CWE-787Out-of-bounds Write

How to fix

Remediation Available

glib2.0Debian

Fixed in:2.66.8-1+deb11u8CVE-2026-1484

Fixed in:2.74.6-2+deb12u9CVE-2026-1484

Fixed in:2.84.4-3~deb13u3CVE-2026-1484

Fixed in:2.86.3-5CVE-2026-1484

glib2.0Ubuntu

Fixed in:2.72.4-0ubuntu2.9USN-8017-1

Fixed in:2.80.0-6ubuntu3.8USN-8017-1

Fixed in:2.86.0-2ubuntu0.3USN-8017-1

libglib2.0-0Ubuntu

Fixed in:2.72.4-0ubuntu2.9USN-8017-1

libglib2.0-0t64Ubuntu

Fixed in:2.80.0-6ubuntu3.8USN-8017-1

Fixed in:2.86.0-2ubuntu0.3USN-8017-1

libglib2.0-binUbuntu

Fixed in:2.72.4-0ubuntu2.9USN-8017-1

Fixed in:2.80.0-6ubuntu3.8USN-8017-1

Fixed in:2.86.0-2ubuntu0.3USN-8017-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityLow

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L

Exploit Intelligence

0.30%probability of exploitation in 30 days

22ndpercentile

Low risk: more likely to be exploited than 22% of all known CVEs.

References

Other references4

Related Vulnerabilities

Other CWE-787 (Out-of-bounds Write) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2023-4863	High	8.8	100%	KEV	Fix
CVE-2020-16040	Medium	6.5	100%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-02.