CVE-2018-13863

Exp

The MongoDB bson JavaScript module (also known as js-bson) versions 0.5.0 to 1.0.x before 1.0.5 is vulnerable to a Regular Expression Denial of Service (ReDoS) in lib/bson/decimal128.js. The flaw is triggered when the Decimal128.fromString() function is called to parse a long untrusted string.

Published: 2018-07-10 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-13863 is rated High Exploit Risk (73.7/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.94%). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.55% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2018-13863

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2018-13863

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.39% 1.94% +1.55%
2 2025-03-30 1.02% 0.39% -0.63%
3 2025-03-29 — 1.02% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-13863

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2018-13863

GitHub Security Advisory for CVE-2018-13863

OS Trackers for CVE-2018-13863

vendor priority summary link
debian not yet assigned CVE-2018-13863 not yet assigned priority: Debian including 1 source packages (node-mongodb), 2 status rows across 2 suites (bookworm, bullseye): resolved 2. https://security-tracker.debian.org/tracker/CVE-2018-13863
redhat low — https://access.redhat.com/security/cve/CVE-2018-13863
ubuntu medium CVE-2018-13863 medium priority: Ubuntu including 1 source packages (node-mongodb), 5 status rows across 5 suites (bionic, focal, trusty, upstream, xenial): DNE 3, not-affected 1, released 1. https://ubuntu.com/security/CVE-2018-13863

Affected software / configurations for CVE-2018-13863

Vendor Product Version Raw CPE
mongodb js-bson >= 0.5.0, < 1.0.5 cpe:2.3:a:mongodb:js-bson:*:*:*:*:*:*:*:*

References for CVE-2018-13863

URL Tags
https://github.com/mongodb/js-bson/commit/bd61c45157c53a1698ff23770160cf4783e9ea4a Patch Third Party Advisory
https://snyk.io/vuln/npm:bson:20180225 Exploit Technical Description Third Party Advisory
cvelogic Threat Intelligence