CVE-2026-110688
CVE-2026-110688 · Cpanel::JSON::XS versions from 4.51 before 4.80 for Perl allow quadratic CPU use by revalidating the remaining buffer per value in incr_parse
This page contains facts from public vulnerability sources. Check the original advisory before updating.
Cpanel::JSON::XS versions from 4.51 before 4.80 for Perl allow quadratic CPU use by revalidating the remaining buffer per value in incr_parse. At the first non-ASCII byte in a string, the decoder validates UTF-8 from there to the end of its input. incr_parse decodes each buffered value with a fresh decoder, so every value revalidates the rest of the buffer, and doubling the input quadruples the work. A peer that sends about a megabyte of ordinary non-ASCII JSON in one read ties up the process for seconds of CPU time.
EPSS 0.2% · Fix available
- Published
- Updated
Stack: system
Affected products and versions
libcpanel-json-xs-perl Debian:12
- Versions
- 4.35-1
- 4.35-1+deb12u1
- 4.36-1
- 4.37-1
- 4.38-1
- 4.39-1
- 4.39-2
- 4.39-2~deb13u1
- 4.40-1
- 4.41-1
- 4.42-1
- 4.51-1
- 4.80-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
libcpanel-json-xs-perl Debian:13
- Versions
- 4.39-1
- 4.39-2
- 4.39-2~deb13u1
- 4.40-1
- 4.41-1
- 4.42-1
- 4.51-1
- 4.80-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
libcpanel-json-xs-perl Debian:14
- Versions
- 4.39-1
- 4.39-2
- 4.39-2~deb13u1
- 4.40-1
- 4.41-1
- 4.42-1
- 4.51-1
- Affected ranges
- ECOSYSTEM: < 4.80-1
Update to 4.80-1
libcpanel-json-xs-perl Ubuntu:16.04:LTS
- Versions
- 3.0115-1
- 3.0210-1ubuntu1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
libcpanel-json-xs-perl Ubuntu:18.04:LTS
- Versions
- 3.0225-1build1
- 3.0239-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
libcpanel-json-xs-perl Ubuntu:20.04:LTS
- Versions
- 4.12-1
- 4.12-1build1
- 4.15-1
- 4.17-1
- 4.18-1
- 4.19-1
- 4.19-1build1
- 4.19-1ubuntu0.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
libcpanel-json-xs-perl Ubuntu:22.04:LTS
- Versions
- 4.25-1build1
- 4.25-1build2
- 4.27-1
- 4.27-1build1
- 4.27-1ubuntu0.1
- 4.27-1ubuntu0.2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
libcpanel-json-xs-perl Ubuntu:24.04:LTS
- Versions
- 4.37-1
- 4.37-1build1
- 4.37-1build2
- 4.37-1build3
- 4.37-1ubuntu0.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
libcpanel-json-xs-perl Ubuntu:26.10
- Versions
- 4.40-1
- 4.42-1
- 4.42-1build1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
libcpanel-json-xs-perl Ubuntu:26.04:LTS
- Versions
- 4.39-2
- 4.40-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published