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CVE-2020-12135

16
FAUCET Score

CVE-2020-12135 is a vulnerability in bson versions before 0.8, affecting products such as mongodb c_driver and whoopsie, where integer overflows can occur due to incorrect use of int instead of size_t for memory allocation. This local vulnerability has a medium severity CVSS score of 5.5, indicating that an attacker could achieve high availability impact through user interaction. There is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.2.69CPE matchmatch criteria
cpe:2.3:a:whoopsie_project:whoopsie:*:*:*:*:*:*:*:*
< 0.8CPE matchmatch criteria
cpe:2.3:a:mongodb:c_driver:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.17%
Probability of exploitation in next 30 days
EPSS Percentile
64.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0117 is in the 75th percentile among its peer group of 5,765 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2020-12135Moderate

bson: integer overflow in bson_ensure_space() parameter bytesNeeded

Apr 13, 2020

References

bugs.launchpad.net / ubuntu/+source/whoopsie/+bug/1872560
ExploitThird Party Advisory
github.com / 10gen-archive/mongo-c-driver-legacy/commit/1a1f5e26a4309480d88598913f9eebf9e9cba8ca
PatchThird Party Advisory
launchpadlibrarian.net / 474887364/bson-fix-overflow.patch
PatchThird Party Advisory
usn.ubuntu.com / 4450-1