HOMEVULNERABILITIESCVE-2019-11935
CRITICAL

CVE-2019-11935

CWE-125Published: December 4, 2019· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

Insufficient boundary checks when processing a string in mb_ereg_replace allows access to out-of-bounds memory. This issue affects HHVM versions prior to 3.30.12, all versions between 4.0.0 and 4.8.5, all versions between 4.9.0 and 4.23.1, as well as 4.24.0, 4.25.0, 4.26.0, 4.27.0, 4.28.0, and 4.28.1.

NVD Source

Technical Analysis

CVE-2019-11935 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.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/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 · 7 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/1c518555dba6ceb45d5ba61845b96e261219c3b7
PATCHhttps://github.com/facebook/hhvm/commit/1c518555dba6ceb45d5ba61845b96e261219c3b7
ADVISORYhttps://hhvm.com/blog/2019/10/28/security-update.html
ADVISORYhttps://www.facebook.com/security/advisories/cve-2019-11935
ADVISORYhttps://hhvm.com/blog/2019/10/28/security-update.html
ADVISORYhttps://www.facebook.com/security/advisories/cve-2019-11935

All References (6)

→
https://github.com/facebook/hhvm/commit/1c518555dba6ceb45d5ba61845b96e261219c3b7Patch · Third Party Advisory
→
https://hhvm.com/blog/2019/10/28/security-update.htmlVendor Advisory
→
https://www.facebook.com/security/advisories/cve-2019-11935Vendor Advisory
→
https://github.com/facebook/hhvm/commit/1c518555dba6ceb45d5ba61845b96e261219c3b7Patch · Third Party Advisory
→
https://hhvm.com/blog/2019/10/28/security-update.htmlVendor Advisory
→
https://www.facebook.com/security/advisories/cve-2019-11935Vendor Advisory

Quick Facts

CVE IDCVE-2019-11935
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-125
CISA KEVNo
Affected1 vendor(s)
PublishedDec 4, 2019

Related CVEs (CWE-125)

CVE-2013-0767
10.0
CVE-2021-41556
10.0
CVE-2021-21777
10.0
CVE-2009-2523
10.0
CVE-2017-14451
10.0
CVE-2026-34987
9.9

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-11935 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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