HOMEVULNERABILITIESCVE-2019-11926
CRITICAL

CVE-2019-11926

CWE-119Published: September 6, 2019· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

Insufficient boundary checks when processing M_SOFx markers from JPEG headers in the GD extension could allow access to out-of-bounds memory via a maliciously constructed invalid JPEG input. This issue affects HHVM versions prior to 3.30.9, all versions between 4.0.0 and 4.8.3, all versions between 4.9.0 and 4.15.2, and versions 4.16.0 to 4.16.3, 4.17.0 to 4.17.2, 4.18.0 to 4.18.1, 4.19.0, 4.20.0 to 4.20.1.

NVD Source

Technical Analysis

CVE-2019-11926 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-119): Buffer overflow vulnerabilities can lead to arbitrary code execution or denial of service by corrupting adjacent memory.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

facebook1 product(s)
hhvm
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/facebook/hhvm/commit/f9680d21beaa9eb39d166e8810e29fbafa51ad15
PATCHhttps://github.com/facebook/hhvm/commit/f9680d21beaa9eb39d166e8810e29fbafa51ad15
ADVISORYhttps://hhvm.com/blog/2019/09/03/security-update.html
ADVISORYhttps://www.facebook.com/security/advisories/cve-2019-11926
ADVISORYhttps://hhvm.com/blog/2019/09/03/security-update.html
ADVISORYhttps://www.facebook.com/security/advisories/cve-2019-11926

All References (6)

→
https://github.com/facebook/hhvm/commit/f9680d21beaa9eb39d166e8810e29fbafa51ad15Patch · Third Party Advisory
→
https://hhvm.com/blog/2019/09/03/security-update.htmlThird Party Advisory
→
https://www.facebook.com/security/advisories/cve-2019-11926Vendor Advisory
→
https://github.com/facebook/hhvm/commit/f9680d21beaa9eb39d166e8810e29fbafa51ad15Patch · Third Party Advisory
→
https://hhvm.com/blog/2019/09/03/security-update.htmlThird Party Advisory
→
https://www.facebook.com/security/advisories/cve-2019-11926Vendor Advisory

Quick Facts

CVE IDCVE-2019-11926
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-119
CISA KEVNo
Affected1 vendor(s)
PublishedSep 6, 2019

Related CVEs (CWE-119)

CVE-2008-0016
10.0
CVE-2013-3075
10.0
CVE-2008-0477
10.0
CVE-2010-4742
10.0
CVE-2006-2372
10.0
CVE-2008-0659
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-11926 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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