---
title: "CVE-2026-96889: Librsvg: use-after-free when xml includes have duplicated entities"
url: https://erroneo.us/security/cve/CVE-2026-96889/
description: "CVE-2026-96889 (Red Hat Red Hat Enterprise Linux 10): A flaw was found in librsvg. When processing an SVG document containing nested XML inclusions…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-09-23
date_modified: 2026-10-21
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-96889"
kev: false
cvss: 7.8
epss: 0.00151
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-96889: Librsvg: use-after-free when xml includes have duplicated entities

**Signal:** Normal patch cycle. No exploitation signal; fix it in your next routine update if you are affected. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 0.2% , percentile 4: FIRST’s model estimates a 0.2% chance of exploitation activity in the next 30 days, higher than 4% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Needs local access needed. Lower urgency for most teams unless an attacker could already run code on the machine.
- Editorial verdict: Patch this week. Next.js: Two Critical Unauthenticated RCEs (Oct 14) — Self-hosted Next.js apps should move to 16.4.1 or 15.5.28 this week; both RCEs have preconditions and no exploitation is reported, but the fix is a routine minor upgrade.

## What it is

A flaw was found in librsvg. When processing an SVG document containing nested XML inclusions (Xincludes) with duplicate entity declarations, a use-after-free error can occur. This vulnerability arises because the library incorrectly frees an XML entity that is still in use by the parser. An attacker could potentially exploit this to cause a denial of service or execute arbitrary code.

## Affected products (CVE record)

- Red Hat Red Hat Enterprise Linux 10: see advisory
- Red Hat Red Hat Enterprise Linux 10: see advisory
- Red Hat Red Hat Enterprise Linux 8: see advisory
- Red Hat Red Hat Enterprise Linux 9: see advisory
- Red Hat Red Hat Enterprise Linux 6: see advisory
- Red Hat Red Hat Enterprise Linux 7: see advisory

## Severity

- redhat CVSS 3.1: 7.8 `CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.15% probability of exploitation activity in the next 30 days; percentile 4.

## Sources

- [RHSA-2026:86331](https://access.redhat.com/errata/RHSA-2026:86331)
- [RHSA-2026:86841](https://access.redhat.com/errata/RHSA-2026:86841)
- [RHSA-2026:86842](https://access.redhat.com/errata/RHSA-2026:86842)
- [RHSA-2026:86921](https://access.redhat.com/errata/RHSA-2026:86921)
- [CVE.org record CVE-2026-96889](https://www.cve.org/CVERecord?id=CVE-2026-96889)
- [NVD entry CVE-2026-96889](https://nvd.nist.gov/vuln/detail/CVE-2026-96889)
- [access.redhat.com](https://access.redhat.com/security/cve/CVE-2026-96889)
- [RHBZ#2539279](https://bugzilla.redhat.com/show_bug.cgi?id=2539279)
- [crates.io](https://crates.io/crates/librsvg)
- [gitlab.gnome.org](https://gitlab.gnome.org/GNOME/librsvg/-/work_items/1241)
- [rustsec.org](https://rustsec.org/advisories/RUSTSEC-2026-0305.html)

---
Source page: https://erroneo.us/security/cve/CVE-2026-96889/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt