CVE-2026-1489 Glib: glib: memory corruption via integer overflow in unicode case conversion
An integer overflow in GLib's Unicode case conversion allows attackers to trigger memory corruption and potential code execution via crafted strings.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-1489?
CVE-2026-1489 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, published on 27 Jan 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A flaw was found in GLib. An integer overflow vulnerability in its Unicode case conversion implementation can lead to memory corruption. By processing specially crafted and extremely large Unicode strings, an attacker could trigger an undersized memory allocation, resulting in out-of-bounds writes. This could cause applications utilizing GLib for string conversion to crash or become unstable.
Weakness: CWE-787
Which versions are affected by CVE-2026-1489?
How do I fix CVE-2026-1489?
Apply the vendor's patch.
Is CVE-2026-1489 being exploited?
There is no known exploitation of CVE-2026-1489 in the wild and no public exploit code.
Sources
Also known as AZL-76469, AZL-76545, BELL-CVE-2026-1489, DEBIAN-CVE-2026-1489, ECHO-6af9-fc0c-2334, GHSA-9m4g-m3p5-p6gm and 2 more.