CVE-2026-1484
CVE-2026-1484 is a medium-severity vulnerability with a CVSS 3.x base score of 4.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: Medium (CVSS 3.x base score 4.2)
- EPSS exploit prediction: 0% (22nd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-4825
- Weakness: CWE-787
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2026-1484?
- 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.
- How severe is CVE-2026-1484?
- CVE-2026-1484 has a CVSS 3.x base score of 4.2, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability low.
- Is CVE-2026-1484 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-1484?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2026-1484 have an EU (EUVD) identifier?
- Yes. CVE-2026-1484 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4825.
- When was CVE-2026-1484 published?
- CVE-2026-1484 was published on 2026-01-27 and last updated on 2026-06-17.
References
- https://access.redhat.com/security/cve/CVE-2026-1484
- https://bugzilla.redhat.com/show_bug.cgi?id=2433259
- https://gitlab.gnome.org/GNOME/glib/-/issues/3870
- https://cert-portal.siemens.com/productcert/html/ssa-253495.html
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