Security Digest · Vulnerability record
CVE-2026-96889: Librsvg: use-after-free when xml includes have duplicated entities
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.
CVSS 7.8 High EPSS 0.2% · p4 Patch this week
Should you act?
Normal patch cycle
No exploitation signal; fix it in your next routine update if you are affected. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- 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.
Weakness type: CWE-416.
Product: Red Hat Red Hat Enterprise Linux 10 · Assigned by: redhat · Published: 2026-09-23
Affected and fixed versions
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | see vendor advisory |
| Red Hat | Red Hat Enterprise Linux 10 | see vendor advisory |
| Red Hat | Red Hat Enterprise Linux 8 | see vendor advisory |
| Red Hat | Red Hat Enterprise Linux 9 | see vendor advisory |
| Red Hat | Red Hat Enterprise Linux 6 | see vendor advisory |
| Red Hat | Red Hat Enterprise Linux 7 | see vendor advisory |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| redhat | 3.1 | 7.8 High | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
- Attack vector: local access needed
- Attack complexity: low
- Privileges required: none (no login)
- User interaction: required (a user must click/open something)
- Scope: unchanged
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- 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.
Timeline
- — CVE record published by redhat
- — erroneo.us brief: Next.js: Two Critical Unauthenticated RCEs (Oct 14)
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vendor and project advisories, patches
- RHSA-2026:86331 access.redhat.com
- RHSA-2026:86841 access.redhat.com
- RHSA-2026:86842 access.redhat.com
- RHSA-2026:86921 access.redhat.com
Vulnerability records
- CVE.org record CVE-2026-96889 cve.org
- NVD entry CVE-2026-96889 nvd.nist.gov
Other references from the CVE record and advisory
- access.redhat.com access.redhat.com
- RHBZ#2539279 bugzilla.redhat.com
- crates.io crates.io
- gitlab.gnome.org gitlab.gnome.org
- rustsec.org rustsec.org