HOMEVULNERABILITIESCVE-2020-1911
CRITICAL

CVE-2020-1911

CWE-843Published: September 4, 2020· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

A type confusion vulnerability when resolving properties of JavaScript objects with specially-crafted prototype chains in Facebook Hermes prior to commit fe52854cdf6725c2eaa9e125995da76e6ceb27da allows attackers to potentially execute arbitrary code via crafted JavaScript. Note that this is only exploitable if the application using Hermes permits evaluation of untrusted JavaScript. Hence, most React Native applications are not affected.

NVD Source

Technical Analysis

CVE-2020-1911 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)
hermes
Source: NVD CPE · 1 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/hermes/commit/fe52854cdf6725c2eaa9e125995da76e6ceb27da
PATCHhttps://github.com/facebook/hermes/commit/fe52854cdf6725c2eaa9e125995da76e6ceb27da
ADVISORYhttps://www.facebook.com/security/advisories/cve-2020-1911
ADVISORYhttps://www.facebook.com/security/advisories/cve-2020-1911

All References (4)

→
https://github.com/facebook/hermes/commit/fe52854cdf6725c2eaa9e125995da76e6ceb27daPatch · Third Party Advisory
→
https://www.facebook.com/security/advisories/cve-2020-1911Third Party Advisory
→
https://github.com/facebook/hermes/commit/fe52854cdf6725c2eaa9e125995da76e6ceb27daPatch · Third Party Advisory
→
https://www.facebook.com/security/advisories/cve-2020-1911Third Party Advisory

Quick Facts

CVE IDCVE-2020-1911
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-843
CISA KEVNo
Affected1 vendor(s)
PublishedSep 4, 2020

Related CVEs (CWE-843)

CVE-2010-2299
10.0
CVE-2021-33970
10.0
CVE-2019-7969
9.8
CVE-2019-7971
9.8
CVE-2019-7972
9.8
CVE-2019-7970
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-1911 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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