How severe is CVE-2020-26883?

CVE-2020-26883 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-2020-26883 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-26883?

CVE-2020-26883 affects Lightbend Play Framework. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-26883?

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-2020-26883 published?

CVE-2020-26883 was published on 2020-11-06 and last updated on 2026-06-17.

CVE-2020-26883

CVE-2020-26883 is a high-severity vulnerability in Lightbend Play Framework 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-674.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-674
Affected product: Lightbend Play Framework
Published: 2020-11-06
Last modified: 2026-06-17

Description

In Play Framework 2.6.0 through 2.8.2, stack consumption can occur because of unbounded recursion during parsing of crafted JSON documents.

Frequently asked questions

What is CVE-2020-26883?: In Play Framework 2.6.0 through 2.8.2, stack consumption can occur because of unbounded recursion during parsing of crafted JSON documents.
How severe is CVE-2020-26883?: CVE-2020-26883 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-2020-26883 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-26883?: CVE-2020-26883 affects Lightbend Play Framework. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-26883?: 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-2020-26883 published?: CVE-2020-26883 was published on 2020-11-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:lightbend:play_framework:*:*:*:*:*:*:*:*

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