CVE catalog

CVE-2026-87862

curl vulnerabilities

Severity: High · CVSS 7.4CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Published: Oct 13, 2026, 10:00:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.26% · Oct 25, 2026

Importing a `includeSubDomains` parent HSTS entry before a longer-lived child entry, silently drops the child. Consequently, when the parent expires, the child's valid HSTS policy is lost, causing curl to issue unencrypted HTTP requests rather than upgrading to HTTPS.

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	curl	sid	`8.23.0-1`	fixed
Debian	curl	forky	`8.22.0-1`	vulnerable
Debian	curl	trixie	`8.14.1-2+deb13u5`	vulnerable
Debian	curl	trixie-security	`8.14.1-2+deb13u7`	vulnerable
Debian	curl	bookworm	`7.88.1-10+deb12u15`	not affected
Debian	curl	bookworm-security	`7.88.1-10+deb12u5`	not affected
Ubuntu	curl	noble	`8.5.0-2ubuntu10.16`	fixed
Ubuntu	libcurl3t64-gnutls	noble	`8.5.0-2ubuntu10.16`	fixed
Ubuntu	libcurl4-doc	noble	`8.5.0-2ubuntu10.16`	fixed
Ubuntu	libcurl4-gnutls-dev	noble	`8.5.0-2ubuntu10.16`	fixed
Ubuntu	libcurl4-openssl-dev	noble	`8.5.0-2ubuntu10.16`	fixed
Ubuntu	libcurl4t64	noble	`8.5.0-2ubuntu10.16`	fixed
Ubuntu	curl	22.04	`7.74.0-1.3ubuntu2`	vulnerable
Ubuntu	curl	22.04	`7.74.0-1.3ubuntu3`	vulnerable
Ubuntu	curl	22.04	`7.80.0-3`	vulnerable
Ubuntu	curl	22.04	`7.81.0-1`	vulnerable
Ubuntu	curl	22.04	`7.81.0-1ubuntu1.1`	vulnerable
Ubuntu	curl	22.04	`7.81.0-1ubuntu1.2`	vulnerable
Ubuntu	curl	22.04	`7.81.0-1ubuntu1.3`	vulnerable
Ubuntu	curl	22.04	`7.81.0-1ubuntu1.4`	vulnerable
Ubuntu	curl	22.04	`7.81.0-1ubuntu1.6`	vulnerable
Ubuntu	curl	22.04	`7.81.0-1ubuntu1.7`	vulnerable
Ubuntu	curl	22.04	`7.81.0-1ubuntu1.8`	vulnerable
Ubuntu	curl	22.04	`7.81.0-1ubuntu1.10`	vulnerable
Ubuntu	curl	22.04	`7.81.0-1ubuntu1.11`	vulnerable
Ubuntu	curl	22.04	`7.81.0-1ubuntu1.13`	vulnerable
Ubuntu	curl	22.04	`7.81.0-1ubuntu1.14`	vulnerable
Ubuntu	curl	22.04	`7.81.0-1ubuntu1.15`	vulnerable
Ubuntu	curl	22.04	`7.81.0-1ubuntu1.16`	vulnerable
Ubuntu	curl	22.04	`7.81.0-1ubuntu1.17`	vulnerable
Ubuntu	curl	22.04	`7.81.0-1ubuntu1.18`	vulnerable
Ubuntu	curl	22.04	`7.81.0-1ubuntu1.19`	vulnerable
Ubuntu	curl	22.04	`7.81.0-1ubuntu1.20`	vulnerable
Ubuntu	curl	22.04	`7.81.0-1ubuntu1.21`	vulnerable
Ubuntu	curl	22.04	`7.81.0-1ubuntu1.22`	vulnerable
Ubuntu	curl	22.04	`7.81.0-1ubuntu1.23`	vulnerable
Ubuntu	curl	22.04	`7.81.0-1ubuntu1.24`	vulnerable
Ubuntu	curl	22.04	`7.81.0-1ubuntu1.25`	vulnerable
Ubuntu	curl	22.04	`7.81.0-1ubuntu1.26`	vulnerable
Ubuntu	curl	22.04	`7.81.0-1ubuntu1.27`	vulnerable
Ubuntu	curl	22.04	`7.81.0-1ubuntu1.29`	vulnerable
Ubuntu	curl	22.04	`7.81.0-1ubuntu1.30`	fixed
Ubuntu	curl	24.04	`8.2.1-1ubuntu3`	vulnerable
Ubuntu	curl	24.04	`8.2.1-1ubuntu3.1`	vulnerable
Ubuntu	curl	24.04	`8.4.0-2ubuntu1`	vulnerable
Ubuntu	curl	24.04	`8.5.0-2ubuntu1`	vulnerable
Ubuntu	curl	24.04	`8.5.0-2ubuntu2`	vulnerable
Ubuntu	curl	24.04	`8.5.0-2ubuntu8`	vulnerable
Ubuntu	curl	24.04	`8.5.0-2ubuntu9`	vulnerable
Ubuntu	curl	24.04	`8.5.0-2ubuntu10`	vulnerable
Ubuntu	curl	24.04	`8.5.0-2ubuntu10.1`	vulnerable
Ubuntu	curl	24.04	`8.5.0-2ubuntu10.2`	vulnerable
Ubuntu	curl	24.04	`8.5.0-2ubuntu10.3`	vulnerable
Ubuntu	curl	24.04	`8.5.0-2ubuntu10.4`	vulnerable
Ubuntu	curl	24.04	`8.5.0-2ubuntu10.5`	vulnerable
Ubuntu	curl	24.04	`8.5.0-2ubuntu10.6`	vulnerable
Ubuntu	curl	24.04	`8.5.0-2ubuntu10.7`	vulnerable
Ubuntu	curl	24.04	`8.5.0-2ubuntu10.8`	vulnerable
Ubuntu	curl	24.04	`8.5.0-2ubuntu10.9`	vulnerable
Ubuntu	curl	24.04	`8.5.0-2ubuntu10.10`	vulnerable
Ubuntu	curl	24.04	`8.5.0-2ubuntu10.11`	vulnerable
Ubuntu	curl	24.04	`8.5.0-2ubuntu10.12`	vulnerable
Ubuntu	curl	24.04	`8.5.0-2ubuntu10.13`	vulnerable
Ubuntu	curl	24.04	`8.5.0-2ubuntu10.15`	vulnerable
Ubuntu	curl	24.04	`8.5.0-2ubuntu10.16`	fixed
Ubuntu	curl	26.10	`8.18.0-1ubuntu2`	vulnerable
Ubuntu	curl	26.10	`8.20.0-2ubuntu1`	vulnerable
Ubuntu	curl	26.10	`8.20.0-2ubuntu3`	vulnerable
Ubuntu	curl	26.10	`8.20.0-2ubuntu10`	vulnerable
Ubuntu	curl	26.10	`8.20.0-2ubuntu11`	vulnerable
Ubuntu	curl	26.10	`8.20.0-2ubuntu11.1`	fixed
Ubuntu	curl	26.04	`8.14.1-2ubuntu1`	vulnerable
Ubuntu	curl	26.04	`8.17.0-1ubuntu1`	vulnerable
Ubuntu	curl	26.04	`8.18.0-1ubuntu1`	vulnerable
Ubuntu	curl	26.04	`8.18.0-1ubuntu2`	vulnerable
Ubuntu	curl	26.04	`8.18.0-1ubuntu2.1`	vulnerable
Ubuntu	curl	26.04	`8.18.0-1ubuntu2.2`	vulnerable
Ubuntu	curl	26.04	`8.18.0-1ubuntu2.3`	vulnerable
Ubuntu	curl	26.04	`8.18.0-1ubuntu2.4`	vulnerable
Ubuntu	curl	26.04	`8.18.0-1ubuntu2.5`	vulnerable
Ubuntu	curl	26.04	`8.18.0-1ubuntu2.7`	vulnerable
Ubuntu	curl	26.04	`8.18.0-1ubuntu2.8`	fixed
Alpine	curl	3.23	`8.23.0-r0`	fixed
Alpine	curl	3.24	`8.23.0-r0`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	curl	source	sid	`8.23.0~rc1-1`	not yet assigned	Not reported	Not reported
Debian	curl	source	forky	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	curl	source	trixie	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	curl	source	bookworm	`Not affected`	unimportant	Not reported	Not reported
Ubuntu	curl	deb	noble	`8.5.0-2ubuntu10.16`	Not reported	Not reported	Not reported
Ubuntu	libcurl3t64-gnutls	deb	noble	`8.5.0-2ubuntu10.16`	Not reported	Not reported	Not reported
Ubuntu	libcurl4-doc	deb	noble	`8.5.0-2ubuntu10.16`	Not reported	Not reported	Not reported
Ubuntu	libcurl4-gnutls-dev	deb	noble	`8.5.0-2ubuntu10.16`	Not reported	Not reported	Not reported
Ubuntu	libcurl4-openssl-dev	deb	noble	`8.5.0-2ubuntu10.16`	Not reported	Not reported	Not reported
Ubuntu	libcurl4t64	deb	noble	`8.5.0-2ubuntu10.16`	Not reported	Not reported	Not reported
Ubuntu	curl	deb	22.04	`7.81.0-1ubuntu1.30`	Not reported	UBUNTU-CVE-2026-87862	Not reported
Ubuntu	curl	deb	24.04	`8.5.0-2ubuntu10.16`	Not reported	UBUNTU-CVE-2026-87862	Not reported
Ubuntu	curl	deb	26.10	`8.20.0-2ubuntu11.1`	Not reported	UBUNTU-CVE-2026-87862	Not reported
Ubuntu	curl	deb	26.04	`8.18.0-1ubuntu2.8`	Not reported	UBUNTU-CVE-2026-87862	Not reported
Alpine	curl	apk	3.23	`8.23.0-r0`	Not reported	ALPINE-CVE-2026-87862	Not reported
Alpine	curl	apk	3.24	`8.23.0-r0`	Not reported	ALPINE-CVE-2026-87862	Not reported

Notes

[trixie] curl: Minor issue

OpenFactory catalog packages

[Debian 13 (Trixie)]

[curl]Affected
Details (5)
- 8.14.1-2+deb13u4 · amd64 · trixie
  Affected
  usn · curl · debian · 13
- 8.14.1-2+deb13u4 · arm64 · trixie
  Affected
  usn · curl · debian · 13
- 8.21.0-2~bpo13+1 · amd64 · trixie-backports
  Affected
  usn · curl · debian · 13
- 8.21.0-2~bpo13+1 · arm64 · trixie-backports
  Affected
  usn · curl · debian · 13
- 8.14.1-2+deb13u7 · amd64 · trixie-security
  Affected
  usn · curl · debian · 13
[libcurl3t64-gnutls]Affected
Source package: [curl]
Details (5)
- 8.14.1-2+deb13u4 · amd64 · trixie
  Affected
  usn · curl · debian · 13
- 8.14.1-2+deb13u4 · arm64 · trixie
  Affected
  usn · curl · debian · 13
- 8.21.0-2~bpo13+1 · amd64 · trixie-backports
  Affected
  usn · curl · debian · 13
- 8.21.0-2~bpo13+1 · arm64 · trixie-backports
  Affected
  usn · curl · debian · 13
- 8.14.1-2+deb13u7 · amd64 · trixie-security
  Affected
  usn · curl · debian · 13
[libcurl4-doc]Affected
Source package: [curl]
Details (5)
- 8.14.1-2+deb13u4 · all · trixie
  Affected
  usn · curl · debian · 13
- 8.14.1-2+deb13u4 · all · trixie
  Affected
  usn · curl · debian · 13
- 8.21.0-2~bpo13+1 · all · trixie-backports
  Affected
  usn · curl · debian · 13
- 8.21.0-2~bpo13+1 · all · trixie-backports
  Affected
  usn · curl · debian · 13
- 8.14.1-2+deb13u7 · all · trixie-security
  Affected
  usn · curl · debian · 13
[libcurl4-gnutls]Affected
Source package: [curl]
Details (2)
- 8.21.0-2~bpo13+1 · amd64 · trixie-backports
  Affected
  usn · curl · debian · 13
- 8.21.0-2~bpo13+1 · arm64 · trixie-backports
  Affected
  usn · curl · debian · 13
[libcurl4-gnutls-dev]Affected
Source package: [curl]
Details (5)
- 8.14.1-2+deb13u4 · amd64 · trixie
  Affected
  usn · curl · debian · 13
- 8.14.1-2+deb13u4 · arm64 · trixie
  Affected
  usn · curl · debian · 13
- 8.21.0-2~bpo13+1 · amd64 · trixie-backports
  Affected
  usn · curl · debian · 13
- 8.21.0-2~bpo13+1 · arm64 · trixie-backports
  Affected
  usn · curl · debian · 13
- 8.14.1-2+deb13u7 · amd64 · trixie-security
  Affected
  usn · curl · debian · 13
[libcurl4-openssl-dev]Affected
Source package: [curl]
Details (5)
- 8.14.1-2+deb13u4 · amd64 · trixie
  Affected
  usn · curl · debian · 13
- 8.14.1-2+deb13u4 · arm64 · trixie
  Affected
  usn · curl · debian · 13
- 8.21.0-2~bpo13+1 · amd64 · trixie-backports
  Affected
  usn · curl · debian · 13
- 8.21.0-2~bpo13+1 · arm64 · trixie-backports
  Affected
  usn · curl · debian · 13
- 8.14.1-2+deb13u7 · amd64 · trixie-security
  Affected
  usn · curl · debian · 13
[libcurl4t64]Affected
Source package: [curl]
Details (5)
- 8.14.1-2+deb13u4 · amd64 · trixie
  Affected
  usn · curl · debian · 13
- 8.14.1-2+deb13u4 · arm64 · trixie
  Affected
  usn · curl · debian · 13
- 8.21.0-2~bpo13+1 · amd64 · trixie-backports
  Affected
  usn · curl · debian · 13
- 8.21.0-2~bpo13+1 · arm64 · trixie-backports
  Affected
  usn · curl · debian · 13
- 8.14.1-2+deb13u7 · amd64 · trixie-security
  Affected
  usn · curl · debian · 13

[Debian 12 (Bookworm)]

[curl]Not affected
Details (6)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Not affected
  usn · curl · debian · bookworm
- 8.14.1-2+deb13u2~bpo13+1 · amd64 · bookworm-backports
  Not affected
  usn · curl · debian · bookworm
- 8.14.1-2+deb13u2~bpo13+1 · arm64 · bookworm-backports
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Not affected
  usn · curl · debian · bookworm
[libcurl3-gnutls]Not affected
Source package: [curl]
Details (6)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Not affected
  usn · curl · debian · bookworm
- 8.14.1-2+deb13u2~bpo13+1 · amd64 · bookworm-backports
  Not affected
  usn · curl · debian · bookworm
- 8.14.1-2+deb13u2~bpo13+1 · arm64 · bookworm-backports
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Not affected
  usn · curl · debian · bookworm
[libcurl3-nss]Not affected
Source package: [curl]
Details (4)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Not affected
  usn · curl · debian · bookworm
[libcurl4]Not affected
Source package: [curl]
Details (6)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Not affected
  usn · curl · debian · bookworm
- 8.14.1-2+deb13u2~bpo13+1 · amd64 · bookworm-backports
  Not affected
  usn · curl · debian · bookworm
- 8.14.1-2+deb13u2~bpo13+1 · arm64 · bookworm-backports
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Not affected
  usn · curl · debian · bookworm
[libcurl4-doc]Not affected
Source package: [curl]
Details (6)
- 7.88.1-10+deb12u15 · all · bookworm
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u15 · all · bookworm
  Not affected
  usn · curl · debian · bookworm
- 8.14.1-2+deb13u2~bpo13+1 · all · bookworm-backports
  Not affected
  usn · curl · debian · bookworm
- 8.14.1-2+deb13u2~bpo13+1 · all · bookworm-backports
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u5 · all · bookworm-security
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u5 · all · bookworm-security
  Not affected
  usn · curl · debian · bookworm
[libcurl4-gnutls-dev]Not affected
Source package: [curl]
Details (6)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Not affected
  usn · curl · debian · bookworm
- 8.14.1-2+deb13u2~bpo13+1 · amd64 · bookworm-backports
  Not affected
  usn · curl · debian · bookworm
- 8.14.1-2+deb13u2~bpo13+1 · arm64 · bookworm-backports
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Not affected
  usn · curl · debian · bookworm
[libcurl4-nss-dev]Not affected
Source package: [curl]
Details (4)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Not affected
  usn · curl · debian · bookworm
[libcurl4-openssl-dev]Not affected
Source package: [curl]
Details (6)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Not affected
  usn · curl · debian · bookworm
- 8.14.1-2+deb13u2~bpo13+1 · amd64 · bookworm-backports
  Not affected
  usn · curl · debian · bookworm
- 8.14.1-2+deb13u2~bpo13+1 · arm64 · bookworm-backports
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Not affected
  usn · curl · debian · bookworm

Observed: Oct 27, 2026, 4:44:02 AM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]