# CVE-2026-58011: Glib: out-of-bounds read in glib/gdatetime.c:g_date_time_get_ymd via invalid gdatetime

> An out-of-bounds read in GLib's date handling can cause logic errors and denial of service when processing invalid date objects.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 30 Jun 2026
- **Updated:** 29 Oct 2026
- **Also known as:** AZL-91439, BELL-CVE-2026-58011, DEBIAN-CVE-2026-58011, ECHO-4f7c-c9ef-8a40, GHSA-8xmh-8wfg-9f6j, JLSEC-2026-1244, MINI-6xcg-5rcj-2xw7, ROOT-OS-ALPINE-323-CVE-2026-58011, ROOT-OS-DEBIAN-11-CVE-2026-58011, ROOT-OS-DEBIAN-12-CVE-2026-58011, UBUNTU-CVE-2026-58011

## What is CVE-2026-58011?

CVE-2026-58011 is a medium-severity denial of service vulnerability in Redhat Enterprise Linux, published on 30 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A flaw was found in GLib. An out-of-bounds read of only 2 bytes can occur in the g_date_time_get_ymd function in the glib/gdatetime.c file when an invalid GDateTime object produced by the g_date_time_add_full function is processed. This flaw can corrupt the date output and potentially cause logic errors that may lead to a denial of service.

Weakness: CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2026-58011?

It affects 2 products.


Products: Gnome Glib, Redhat Enterprise Linux.

## How do I fix CVE-2026-58011?

Apply the vendor's patch.

## Is CVE-2026-58011 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-58011 exists.

## Other vulnerabilities in Redhat Enterprise Linux

- [CVE-2020-35457](https://insights.sbomify.com/CVE-2020-35457/): Integer overflow in n/a (high 7.8)
- [CVE-2009-3289](https://insights.sbomify.com/CVE-2009-3289/): Privilege escalation in n/a (high 7.8)
- [CVE-2025-13601](https://insights.sbomify.com/CVE-2025-13601/): Glib: integer overflow in in g_escape_uri_string() (high 7.7)
- [CVE-2026-58016](https://insights.sbomify.com/CVE-2026-58016/): Glib: integer underflow in gio/gdbusintrospection.c via "g_dbus_node_info_new_for_xml" (high 7.5)
- [CVE-2025-4056](https://insights.sbomify.com/CVE-2025-4056/): Glib: glib crash after long command line (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-58011 and fix it if it is affected.

What it is: CVE-2026-58011 is a medium-severity denial of service vulnerability in Redhat Enterprise Linux, published on 30 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-58011 exists.

Affected product: Redhat Enterprise Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-58011/ (Markdown: https://insights.sbomify.com/CVE-2026-58011/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-58011
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-58011
- OSV: https://osv.dev/vulnerability/CVE-2026-58011

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-58011/
Summaries are generated and may contain mistakes; the official description above is the record.