# CVE-2026-10028: GNOME glib-networking infinite loop in GnuTLS certificate verification

Source: https://junglewise.ai/threats/cve-2026-10028-gnome-glib-networking-infinite-loop-in-gnutls-certificate  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-28. Updated: 2026-05-28  
License: CC BY 4.0 with a link back

CVE-2026-10028 · Severity: medium · CVSS 4.3 · Published 2026-05-28

glib-networking is a software component used by many Linux applications to handle secure network connections. A flaw in how it verifies security certificates allows a remote attacker to send a specially crafted certificate that triggers an infinite loop. This causes the affected application to consume 100% of the processor's power, effectively freezing the service and making it unavailable to legitimate users.

Technologies: [Gnome Glib-Networking](https://junglewise.ai/threats/technologies/glib-networking). Vendors: [Gnome](https://junglewise.ai/threats/vendors/gnome).

## Quick answers

**Is CVE-2026-10028 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-10028 being exploited in the wild.

**How severe is CVE-2026-10028?** Medium severity, with a CVSS score of 4.3, published 28 May 2026.

**Which products and versions are affected?** Gnome Glib-Networking 2.80.0-3.el10.

**Is there a fix for CVE-2026-10028?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-10028 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-10028?** Check whether you run Gnome Glib-Networking at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A vulnerability exists in the glib-networking GnuTLS backend within the certificate verification path. When processing a peer-supplied certificate chain, the code in `gtlsdatabase-gnutls.c` fails to detect circular issuer relationships. An attacker can present a crafted chain where certificates mutually reference each other as issuers, causing the `convert_certificate_chain_to_gnutls` function to enter an infinite loop during traversal. This results in a permanent hang of the handshake thread and 100% CPU utilization. The issue affects versions utilizing the GnuTLS backend when certificate verification is performed (e.g., a client connecting to a malicious server or a server verifying client certificates).

## Affected products

- GNOME glib-networking 2.80.0-3.el10

## Timeline

- 2026-05-04: other: Reported to Red Hat by Aisle Research
- 2026-05-28: advisory: CVE-2026-10028 published

## References

- [https://access.redhat.com/security/cve/CVE-2026-10028](https://access.redhat.com/security/cve/CVE-2026-10028)
- [https://bugzilla.redhat.com/show_bug.cgi?id=2465152](https://bugzilla.redhat.com/show_bug.cgi?id=2465152)
- [https://gitlab.gnome.org/GNOME/glib-networking/-/work_items/231](https://gitlab.gnome.org/GNOME/glib-networking/-/work_items/231)

## Related threats

- [glib-networking unbounded memory consumption in TLS 1.3](https://junglewise.ai/threats/cve-2026-103963-a-flaw-was-found-in-glib-networking-when-establishing)
- [GNOME glib-networking uninitialized pointer dereference in OpenSSL backend](https://junglewise.ai/threats/cve-2025-60019-gnome-glib-networking-uninitialized-pointer-dereference-in)
- [GNOME glib-networking out of bounds read in OpenSSL backend](https://junglewise.ai/threats/cve-2025-60018-gnome-glib-networking-out-of-bounds-read-in-openssl-backend)