Description
cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.20.1, cpp-httplib does not have a limit for a unique line, permitting an attacker to explore this to allocate memory arbitrarily. This vulnerability is fixed in 0.20.1. NOTE: This vulnerability is related to CVE-2025-53629.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| yhirose | cpp-httplib | < 0.20.1 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | cpp-httplib | 0.25.0+ds-3 | — |
| Debian 13 | cpp-httplib | No fix yet | — |
| Debian 12 | cpp-httplib | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 25.10 | cpp-httplib | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 24.04 LTS | cpp-httplib | No fix yet | — |
| Ubuntu Pro 22.04 LTS | cpp-httplib | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | cpp-httplib | 0.22.0-160000.4.1 | SUSE-SU-2026:20600-1 |
| SLES 16.0 | cpp-httplib | 0.22.0-160000.4.1 | SUSE-SU-2026:20600-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 16.0 | cpp-httplib | 0.22.0-160000.4.1 | openSUSE-SU-2026:20295-1 |
Advisories 2
- openSUSE-SU-2026:20295-1 Security update for cpp-httplib SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20600-1 Security update for cpp-httplib SUSE / openSUSE Security Updates · Mar 23, 2026