How severe is CVE-2021-46877?

CVE-2021-46877 has a CVSS 3.x base score of 7.5, rated high 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 high.

Is CVE-2021-46877 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-46877?

CVE-2021-46877 primarily affects Fasterxml Jackson-databind. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-46877?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-46877 published?

CVE-2021-46877 was published on 2023-03-18 and last updated on 2026-06-17.

CVE-2021-46877

CVE-2021-46877 is a high-severity vulnerability in Fasterxml Jackson-databind with a CVSS 3.x base score of 7.5. 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-770.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-770
Affected product: Fasterxml Jackson-databind
Published: 2023-03-18
Last modified: 2026-06-17

Description

jackson-databind 2.10.x through 2.12.x before 2.12.6 and 2.13.x before 2.13.1 allows attackers to cause a denial of service (2 GB transient heap usage per read) in uncommon situations involving JsonNode JDK serialization.

Frequently asked questions

What is CVE-2021-46877?: jackson-databind 2.10.x through 2.12.x before 2.12.6 and 2.13.x before 2.13.1 allows attackers to cause a denial of service (2 GB transient heap usage per read) in uncommon situations involving JsonNode JDK serialization.
How severe is CVE-2021-46877?: CVE-2021-46877 has a CVSS 3.x base score of 7.5, rated high 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 high.
Is CVE-2021-46877 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-46877?: CVE-2021-46877 primarily affects Fasterxml Jackson-databind. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-46877?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-46877 published?: CVE-2021-46877 was published on 2023-03-18 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:a:fasterxml:jackson-databind:*:*:*:*:*:*:*:*
cpe:2.3:a:fasterxml:jackson-databind:2.13.0:-:*:*:*:*:*:*
cpe:2.3:a:fasterxml:jackson-databind:2.13.0:rc1:*:*:*:*:*:*
cpe:2.3:a:fasterxml:jackson-databind:2.13.0:rc2:*:*:*:*:*:*

More vulnerabilities in Fasterxml Jackson-databind

CVE-2018-14721 — Critical (CVSS 10.0): FasterXML jackson-databind 2.x before 2.9.7 might allow remote attackers to conduct server-side request forgery (SSRF)…
CVE-2019-14893 — Critical (CVSS 9.8): A flaw was discovered in FasterXML jackson-databind in all versions before 2.9.10 and 2.10.0, where it would permit…
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