CVE-2016-5259
Use-after-free vulnerability in the CanonicalizeXPCOMParticipant function in Mozilla Firefox before 48.0 and Firefox ESR 45.x before 45.3 allows remote attackers to execute arbitrary code via a script that closes its own Service Worker within a nested sync event loop.
Key facts
- CVSS score
- 8.8 (v3.0)
- Severity
- HIGH
- CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H- Weakness (CWE)
- CWE-416
- EPSS score
- 3.3% (88th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2016-6210)
- Published
- August 5, 2016
- NVD last modified
- June 17, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2016-6210 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.
View on the EU Vulnerability DatabaseAffected products
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- mozilla / firefox
- oracle / linux
- oracle / linux
- oracle / linux
Certified products that may be affected
25 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.
- Oracle Linux 7 NSS Cryptographic Module - Oracle Corporation - FIPS 140 4586 - historical
- Oracle Linux 7 Libreswan Cryptographic Module - Oracle Corporation - FIPS 140 4266 - historical
- Oracle Linux 7 OpenSSH Client Cryptographic Module - Oracle Corporation - FIPS 140 4206 - historical
- Oracle Linux 7 OpenSSH Server Cryptographic Module - Oracle Corporation - FIPS 140 4176 - historical
- Oracle Linux 7 Unbreakable Enterprise Kernel (UEK 6) Cryptographic Module - Oracle Corporation - FIPS 140 4169 - historical
See all 25 in the Security Certifications Explorer.
References
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00004.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00029.html
- http://rhn.redhat.com/errata/RHSA-2016-1551.html
- http://www.debian.org/security/2016/dsa-3640
- http://www.mozilla.org/security/announce/2016/mfsa2016-73.html(Vendor Advisory)
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html(Third Party Advisory)
- http://www.securityfocus.com/bid/92258
- http://www.securitytracker.com/id/1036508
- http://www.ubuntu.com/usn/USN-3044-1
- https://bugzilla.mozilla.org/show_bug.cgi?id=1282992(Exploit, Issue Tracking)
- https://security.gentoo.org/glsa/201701-15
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
Query CVEs from your AI assistant
The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.
Add the CVE brain