How severe is CVE-2020-12439?

CVE-2020-12439 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2020-12439 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-12439?

CVE-2020-12439 affects Grin. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-12439?

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

When was CVE-2020-12439 published?

CVE-2020-12439 was published on 2020-05-05 and last updated on 2026-06-17.

CVE-2020-12439

CVE-2020-12439 is a medium-severity vulnerability in Grin with a CVSS 3.x base score of 5.3. 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-404.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-404
Affected product: Grin
Published: 2020-05-05
Last modified: 2026-06-17

Description

Grin before 3.1.0 allows attackers to adversely affect availability of data on a Mimblewimble blockchain.

Frequently asked questions

What is CVE-2020-12439?: Grin before 3.1.0 allows attackers to adversely affect availability of data on a Mimblewimble blockchain.
How severe is CVE-2020-12439?: CVE-2020-12439 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2020-12439 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-12439?: CVE-2020-12439 affects Grin. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-12439?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-12439 published?: CVE-2020-12439 was published on 2020-05-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:grin:grin:*:*:*:*:*:*:*:*

More vulnerabilities in Grin

CVE-2019-9195 — Critical (CVSS 9.8): util/src/zip.rs in Grin before 1.0.2 mishandles suspicious files. An attacker can execute arbitrary code via directory…
CVE-2020-15899 — High (CVSS 7.5): Grin 3.0.0 before 4.0.0 has insufficient validation of data related to Mimblewimble.
CVE-2020-6638 — High (CVSS 7.5): Grin through 2.1.1 has Insufficient Validation.

All CVEs affecting Grin →

Other CWE-404 vulnerabilities

CVE-2023-24444 — Critical (CVSS 9.8): Jenkins OpenID Plugin 2.4 and earlier does not invalidate the previous session on login.
CVE-2024-31611 — Critical (CVSS 9.1): SeaCMS 12.9 has a file deletion vulnerability via admin_template.php.
CVE-2018-8450 — High (CVSS 8.8): A remote code execution vulnerability exists when Windows Search handles objects in memory, aka "Windows Search Remote…
CVE-2026-11317 — High (CVSS 8.7): A denial of service security issue exists in the affected product. The security issue stems from a fault occurring when…
CVE-2022-25762 — High (CVSS 8.6): If a web application sends a WebSocket message concurrently with the WebSocket connection closing when running on…
CVE-2020-26070 — High (CVSS 8.6): A vulnerability in the ingress packet processing function of Cisco IOS XR Software for Cisco ASR 9000 Series…

Browse all CWE-404 vulnerabilities →