How severe is CVE-2026-29062?

CVE-2026-29062 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-2026-29062 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-29062?

CVE-2026-29062 affects Fasterxml Jackson-core. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-29062?

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.

Does CVE-2026-29062 have an EU (EUVD) identifier?

Yes. CVE-2026-29062 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10018.

When was CVE-2026-29062 published?

CVE-2026-29062 was published on 2026-03-06 and last updated on 2026-06-30.

CVE-2026-29062

CVE-2026-29062 is a high-severity vulnerability in Fasterxml Jackson-core 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)
CVSS v4: 8.7
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-10018
Weakness: CWE-770
Affected product: Fasterxml Jackson-core
Published: 2026-03-06
Last modified: 2026-06-30

Description

jackson-core contains core low-level incremental ("streaming") parser and generator abstractions used by Jackson Data Processor. From version 3.0.0 to before version 3.1.0, the UTF8DataInputJsonParser, which is used when parsing from a java.io.DataInput source, bypasses the maxNestingDepth constraint (default: 500) defined in StreamReadConstraints. A similar issue was found in ReaderBasedJsonParser. This allows a user to supply a JSON document with excessive nesting, which can cause a StackOverflowError when the structure is processed, leading to a Denial of Service (DoS). This issue has been patched in version 3.1.0.

Frequently asked questions

What is CVE-2026-29062?: jackson-core contains core low-level incremental ("streaming") parser and generator abstractions used by Jackson Data Processor. From version 3.0.0 to before version 3.1.0, the UTF8DataInputJsonParser, which is used when parsing from a java.io.DataInput source, bypasses the maxNestingDepth constraint (default: 500) defined in StreamReadConstraints. A similar issue was found in ReaderBasedJsonParser. This allows a user to supply a JSON document with excessive nesting, which can cause a StackOverflowError when the structure is processed, leading to a Denial of Service (DoS). This issue has been patched in version 3.1.0.
How severe is CVE-2026-29062?: CVE-2026-29062 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-2026-29062 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-29062?: CVE-2026-29062 affects Fasterxml Jackson-core. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-29062?: 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.
Does CVE-2026-29062 have an EU (EUVD) identifier?: Yes. CVE-2026-29062 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10018.
When was CVE-2026-29062 published?: CVE-2026-29062 was published on 2026-03-06 and last updated on 2026-06-30.

References

Affected products (1)

cpe:2.3:a:fasterxml:jackson-core:*:*:*:*:*:*:*:*

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