Perl Crypt::JWT prior to 0.023 is affected by: Incorrect Access Control.

published 2019-07-17 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-2002

cvss: 9.8; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.3%; EPSS 1.3% chance of exploitation in 30 days, percentile 71%
public exploits: 0; none known

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.

Patch / fix

fixed in 1 links 1

perl_crypt::jwt_project perl_crypt::jwt 0.023

github.com/DCIT/perl-Crypt-JWT@b98a59b commit

Exploit prediction

1.34% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

openwall.com https://www.openwall.com/lists/oss-security/2018/09/07/1 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.0	9.8	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.5	AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

Perl Crypt::JWT Perl Crypt::JWT

Classification

Weakness

CWE-347 Improper Verification of Cryptographic Signature

References

github.com /DCIT/perl-Crypt-JWT/commit/b98a59b42ded9f9e51b2560410106207c2152d6c
patch, third-party-advisory
openwall.com /lists/oss-security/2018/09/07/1
exploit, mailing-list, third-party-advisory

Sources

CVE List CVE-2019-1010263
NVD CVE-2019-1010263

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary