How severe is CVE-2026-58436?

CVE-2026-58436 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-2026-58436 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-58436?

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-2026-58436 published?

CVE-2026-58436 was published on 2026-08-13 and last updated on 2026-08-14.

CVE-2026-58436

CVE-2026-58436 is a high-severity vulnerability 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-407.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-407
Published: 2026-08-13
Last modified: 2026-08-14

Description

ParseAcceptLanguage quadratic-time DoS via Locale middleware on unauthenticated requests

Frequently asked questions

What is CVE-2026-58436?: ParseAcceptLanguage quadratic-time DoS via Locale middleware on unauthenticated requests
How severe is CVE-2026-58436?: CVE-2026-58436 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-2026-58436 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-58436?: 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-2026-58436 published?: CVE-2026-58436 was published on 2026-08-13 and last updated on 2026-08-14.

References

Other CWE-407 vulnerabilities

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