# CVE-2026-15713

## Summary

- **CVE ID:** CVE-2026-15713
- **Severity:** MEDIUM
- **CVSS Score:** 5.9 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)
- **CWE:** CWE-772
- **Published:** Jul 14, 2026
- **Last Modified:** Jul 15, 2026

## Description

A vulnerability was found in libsoup's HTTP/2 protocol implementation. The library fails to correctly release memory context blocks under specific stream termination conditions, such as when an HTTP/2 connection encounters window exhaustion or explicit stream resets. A remote, unauthenticated attacker acting as a malicious network peer can trick the connection engine into allocating stream states that are subsequently leaked during cleanup. Over a sustained period, this flaw allows the remote attacker to consume the system's heap allocations incrementally, triggering a denial of service (DoS) through an ultimate Out-of-Memory (OOM) application crash.

## Affected Products

No affected products listed.

## References

- [CNA](https://access.redhat.com/security/cve/CVE-2026-15713)
- [CNA](https://bugzilla.redhat.com/show_bug.cgi?id=2499941)
- [CNA](https://gitlab.gnome.org/GNOME/libsoup/-/work_items/541)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.56%
- **EPSS Percentile:** 45.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._