How severe is CVE-2019-1010263?

CVE-2019-1010263 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-1010263 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-1010263?

CVE-2019-1010263 affects Perl Crypt. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-1010263?

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

When was CVE-2019-1010263 published?

CVE-2019-1010263 was published on 2019-07-17 and last updated on 2026-06-17.

CVE-2019-1010263

CVE-2019-1010263 is a critical-severity vulnerability in Perl Crypt with a CVSS 3.x base score of 9.8. 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-347.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-347
Affected product: Perl Crypt
Published: 2019-07-17
Last modified: 2026-06-17

Description

Perl Crypt::JWT prior to 0.023 is affected by: Incorrect Access Control. The impact is: allow attackers to bypass authentication by providing a token by crafting with hmac(). The component is: JWT.pm, line 614. The attack vector is: network connectivity. The fixed version is: after commit b98a59b42ded9f9e51b2560410106207c2152d6c.

Frequently asked questions

What is CVE-2019-1010263?: Perl Crypt::JWT prior to 0.023 is affected by: Incorrect Access Control. The impact is: allow attackers to bypass authentication by providing a token by crafting with hmac(). The component is: JWT.pm, line 614. The attack vector is: network connectivity. The fixed version is: after commit b98a59b42ded9f9e51b2560410106207c2152d6c.
How severe is CVE-2019-1010263?: CVE-2019-1010263 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-1010263 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-1010263?: CVE-2019-1010263 affects Perl Crypt. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-1010263?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2019-1010263 published?: CVE-2019-1010263 was published on 2019-07-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:perl_crypt\:\:jwt_project:perl_crypt\:\:jwt:*:*:*:*:*:*:*:*

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