CVE-2026-110681: Use After Free

Cpanel::JSON::XS versions before 4.80 for Perl use the parent interpreter's scalars from a parser object cloned into a new ithread. A parser object holds its callbacks and its incremental parse buffer as raw scalar pointers. When a thread is created, these are copied into the new interpreter...

CVE-2026-110685: Missing Release of Memory after Effective Lifetime

Cpanel::JSON::XS versions before 4.80 for Perl leak the decoded arguments of a tagged value when its THAW method dies in decodetag. With allowtags, a tagged value's class name and argument array are decoded and passed to the class's THAW method. Both are released only after THAW returns, so a THA...

PT-2026-117576

Name of the Vulnerable Software and Affected Versions Cpanel::JSON::XS versions prior to 4.80 Description An issue exists where memory exhaustion can occur due to the buffering of incremental input beyond the max size limit within the incr parse function. The parser appends each data chunk to its...

PT-2026-117580

Name of the Vulnerable Software and Affected Versions Cpanel::JSON::XS versions 3.0202 through 4.79 Description Memory leak occurs when encoding values as strings in the encode stringify function. The issue arises when the function writes a value in string form under allow stringify, convert...

CVE-2026-110687: Improper Handling of Unicode Encoding

Cpanel::JSON::XS versions from 4.43 before 4.80 for Perl misorder byte-string keys during canonical encoding in utf16cmp. canonical sorts keys by UTF-16 code units. When any key in a hash is UTF-8 flagged, every key is decoded as UTF-8 for the comparison, including byte-string keys that the encod...

PT-2026-117574

Name of the Vulnerable Software and Affected Versions Cpanel::JSON::XS versions prior to 4.80 Description Memory exhaustion can occur when encoding exponent notation as full decimal digits while using the allow bignum setting. When allow bignum is enabled, JSON numbers with fractions or exponents...

CVE-2026-110688: Inefficient Algorithmic Complexity

Cpanel::JSON::XS versions from 4.51 before 4.80 for Perl allow quadratic CPU use by revalidating the remaining buffer per value in incrparse. At the first non-ASCII byte in a string, the decoder validates UTF-8 from there to the end of its input. incrparse decodes each buffered value with a fresh...

PT-2026-117575

Name of the Vulnerable Software and Affected Versions Cpanel::JSON::XS versions 4.28 through 4.79 Description A memory leak occurs when decoding JSON with duplicate keys while using the dupkeys as arrayref option in the decode hv function. In this scenario, values for duplicate object keys are...

CVE-2026-110684: Missing Release of Memory after Effective Lifetime

Cpanel::JSON::XS versions from 3.0202 before 4.80 for Perl leak memory and retain overloaded objects when encoding values as strings in encodestringify. encodestringify writes a value in its string form under allowstringify, under convertblessed for objects without TOJSON, and under allowbignum...

PT-2026-117582

Name of the Vulnerable Software and Affected Versions Cpanel::JSON::XS versions prior to 4.80 Description An issue exists in the decode hv function where freed filter callbacks are used when a filter removes itself during the decoding process. The decode process copies the filter json object and...

PT-2026-117578

Name of the Vulnerable Software and Affected Versions Cpanel::JSON::XS versions prior to 4.80 Description When a parser object is cloned into a new ithread, the software uses scalars from the parent interpreter. The parser object stores its incremental parse buffer and callbacks as raw scalar...

PT-2026-117579

Name of the Vulnerable Software and Affected Versions Cpanel::JSON::XS versions 4.42 through 4.79 Description Input chunking can alter the decoded value of top-level numbers within the incr parse function. Because allow nonref is enabled by default and inherited by incr parse, top-level numbers,...

Astra Linux – Vulnerability in libcpanel-json-xs-perl

Cpanel::JSON::XS before version 4.40 for Perl has an integer buffer overflow that causes a segfault when parsing crafted JSON, allowing for denial-of-service attacks or other unspecified impacts...

ROOT-OS-DEBIAN-11-CVE-2022-48623 CVE-2022-48623 in libcpanel-json-xs-perl - Patched by Root

Root has patched CVE-2022-48623 in the libcpanel-json-xs-perl package for Root:Debian:11. Multiple fixed versions available...

SUSE SLES15 Security Update : perl-Cpanel-JSON-XS (SUSE-SU-2026:2782-1)

The remote SUSE Linux SLES15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:2782-1 advisory. This update for perl-Cpanel-JSON-XS fixes the following issues - CVE-2026-9334: type confusion via duplicate object keys when dupkeysasarrayref...

SUSE-SU-2026:2782-1 Security update for perl-Cpanel-JSON-XS

This update for perl-Cpanel-JSON-XS fixes the following issues - CVE-2026-9334: type confusion via duplicate object keys when dupkeysasarrayref is enabled bsc1267546. - CVE-2026-9516: denial of service via UTF-8 BOM prefixed input when a decode filter callback throws bsc1267547...

UBUNTU-CVE-2026-14803

Mojo::JSON versions before 9.47 for Perl allow memory exhaustion via unbounded recursion in the pure-Perl decoder. The pure-Perl decode path decodevalue dispatching to decodearray and decodeobject recurses with no depth limit, so a small deeply nested JSON document can consume excessive memory...

EUVD-2026-41798

Mojo::JSON versions before 9.47 for Perl allow memory exhaustion via unbounded recursion in the pure-Perl decoder. The pure-Perl decode path decodevalue dispatching to decodearray and decodeobject recurses with no depth limit, so a small deeply nested JSON document can consume excessive memory...

Security update for perl-Cpanel-JSON-XS (critical)

openSUSE security update: security update for perl-cpanel-json-xs ------------------------------------------------------------- Announcement ID: openSUSE-SU-2026:21140-1 Rating: critical References: bsc1249331 bsc1267546 bsc1267547 Cross-References: CVE-2025-40929 CVE-2026-9334 CVE-2026-9516 CVSS...

Amazon Linux 2023 : perl-Cpanel-JSON-XS (ALAS2023-2026-1829)

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1829 advisory. BOM-shift PV-corruption SIGABRT CVE-2026-9516 Tenable has extracted the preceding description block directly from the tested product security advisory. Note that Nessus has not tested for this issue bu...