How severe is CVE-2020-12135?

CVE-2020-12135 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-12135 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-12135?

CVE-2020-12135 primarily affects Whoopsie Project Whoopsie. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-12135?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-12135 published?

CVE-2020-12135 was published on 2020-04-24 and last updated on 2026-06-17.

CVE-2020-12135

CVE-2020-12135 is a medium-severity vulnerability in Whoopsie Project Whoopsie with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-190.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-190
Affected product: Whoopsie Project Whoopsie
Published: 2020-04-24
Last modified: 2026-06-17

Description

bson before 0.8 incorrectly uses int rather than size_t for many variables, parameters, and return values. In particular, the bson_ensure_space() parameter bytesNeeded could have an integer overflow via properly constructed bson input.

Frequently asked questions

What is CVE-2020-12135?: bson before 0.8 incorrectly uses int rather than size_t for many variables, parameters, and return values. In particular, the bson_ensure_space() parameter bytesNeeded could have an integer overflow via properly constructed bson input.
How severe is CVE-2020-12135?: CVE-2020-12135 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-12135 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-12135?: CVE-2020-12135 primarily affects Whoopsie Project Whoopsie. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-12135?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-12135 published?: CVE-2020-12135 was published on 2020-04-24 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:whoopsie_project:whoopsie:*:*:*:*:*:*:*:*
cpe:2.3:a:mongodb:c_driver:*:*:*:*:*:*:*:*

More vulnerabilities in Whoopsie Project Whoopsie

CVE-2019-11484 — Medium (CVSS 6.3): Kevin Backhouse discovered an integer overflow in bson_ensure_space, as used in whoopsie.
CVE-2020-15570 — Medium (CVSS 5.5): The parse_report() function in whoopsie.c in Whoopsie through 0.2.69 mishandles memory allocation failures, which…

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