CVE catalog

CVE-2026-32627

cpp-httplib: CVE-2026-32627

Severity: High · CVSS 8.7CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
Published: Mar 13, 2026, 8:48:14 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.19% · Oct 25, 2026

cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.37.2, when a cpp-httplib client is configured with a proxy and set_follow_location(true), any HTTPS redirect it follows will have TLS certificate and hostname verification silently disabled on the new connection. The client will accept any certificate presented by the redirect target — expired, self-signed, or forged — without raising an error or notifying the application. A network attacker in a position to return a redirect response can fully intercept the follow-up HTTPS connection, including any credentials or session tokens in flight. This vulnerability is fixed in 0.37.2.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	cpp-httplib	sid	`0.41.0+ds-3`	fixed
Debian	cpp-httplib	forky	`0.41.0+ds-3`	fixed
Debian	cpp-httplib	trixie	`0.18.7-1+deb13u1`	vulnerable
Debian	cpp-httplib	trixie-security	`0.18.7-1+deb13u1`	vulnerable
Debian	cpp-httplib	bookworm	`0.11.4+ds-1+deb12u1`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	cpp-httplib	source	sid	`0.41.0+ds-3`	not yet assigned	Not reported	[1130876]
Debian	cpp-httplib	source	forky	`0.41.0+ds-3`	not yet assigned	Not reported	[1130876]
Debian	cpp-httplib	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1130876]
Debian	cpp-httplib	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1130876]

[Debian bug #1130876]

Notes

[trixie] cpp-httplib: Minor issue [bookworm] cpp-httplib: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libcpp-httplib0.11]Affected
Source package: [cpp-httplib]
Details (2)
- 0.11.4+ds-1+deb12u1 · amd64 · bookworm
  Affected
  dsa · cpp-httplib · debian · bookworm; dsa · cpp-httplib · debian · 12
- 0.11.4+ds-1+deb12u1 · arm64 · bookworm
  Affected
  dsa · cpp-httplib · debian · bookworm; dsa · cpp-httplib · debian · 12
[libcpp-httplib-dev]Affected
Source package: [cpp-httplib]
Details (2)
- 0.11.4+ds-1+deb12u1 · amd64 · bookworm
  Affected
  dsa · cpp-httplib · debian · bookworm; dsa · cpp-httplib · debian · 12
- 0.11.4+ds-1+deb12u1 · arm64 · bookworm
  Affected
  dsa · cpp-httplib · debian · bookworm; dsa · cpp-httplib · debian · 12

[Debian 13 (Trixie)]

[libcpp-httplib0.18]Affected
Source package: [cpp-httplib]
Details (4)
- 0.18.7-1+deb13u1 · amd64 · trixie
  Affected
  dsa · cpp-httplib · debian · 13
- 0.18.7-1+deb13u1 · arm64 · trixie
  Affected
  dsa · cpp-httplib · debian · 13
- 0.18.7-1+deb13u1 · amd64 · trixie-security
  Affected
  dsa · cpp-httplib · debian · 13
- 0.18.7-1+deb13u1 · arm64 · trixie-security
  Affected
  dsa · cpp-httplib · debian · 13
[libcpp-httplib0.41]Affected
Source package: [cpp-httplib]
Details (2)
- 0.41.0+ds-3~bpo13+1 · amd64 · trixie-backports
  Affected
  dsa · cpp-httplib · debian · 13
- 0.41.0+ds-3~bpo13+1 · arm64 · trixie-backports
  Affected
  dsa · cpp-httplib · debian · 13
[libcpp-httplib-dev]Affected
Source package: [cpp-httplib]
Details (6)
- 0.18.7-1+deb13u1 · amd64 · trixie
  Affected
  dsa · cpp-httplib · debian · 13
- 0.18.7-1+deb13u1 · arm64 · trixie
  Affected
  dsa · cpp-httplib · debian · 13
- 0.41.0+ds-3~bpo13+1 · amd64 · trixie-backports
  Affected
  dsa · cpp-httplib · debian · 13
- 0.41.0+ds-3~bpo13+1 · arm64 · trixie-backports
  Affected
  dsa · cpp-httplib · debian · 13
- 0.18.7-1+deb13u1 · amd64 · trixie-security
  Affected
  dsa · cpp-httplib · debian · 13
- 0.18.7-1+deb13u1 · arm64 · trixie-security
  Affected
  dsa · cpp-httplib · debian · 13

Observed: Oct 27, 2026, 9:30:00 AM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]