CVE catalog

CVE-2026-18924

curl vulnerabilities

Severity: Critical · CVSS 9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Published: Jul 3, 2026, 7:16:25 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.58% · Oct 25, 2026

A flaw in libcurl's handling of HTTP/2 Server Push streams, when the parent handle is set to share connections with other handles, can lead to use-after-free in the cleanup process.

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`	fixed
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`	vulnerable
Debian	curl	bookworm-security	`7.88.1-10+deb12u5`	vulnerable
Cpe	curl	Not reported	`8.22.0`	fixed
Ubuntu	curl	noble	`8.5.0-2ubuntu10.15`	fixed
Ubuntu	libcurl3t64-gnutls	noble	`8.5.0-2ubuntu10.15`	fixed
Ubuntu	libcurl4-doc	noble	`8.5.0-2ubuntu10.15`	fixed
Ubuntu	libcurl4-gnutls-dev	noble	`8.5.0-2ubuntu10.15`	fixed
Ubuntu	libcurl4-openssl-dev	noble	`8.5.0-2ubuntu10.15`	fixed
Ubuntu	libcurl4t64	noble	`8.5.0-2ubuntu10.15`	fixed
Alpine	curl	3.23	`8.22.0-r0`	fixed
Alpine	curl	3.24	`8.22.0-r0`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	curl	source	sid	`8.22.0~rc2-1`	not yet assigned	Not reported	Not reported
Debian	curl	source	forky	`8.22.0~rc2-1`	not yet assigned	Not reported	Not reported
Debian	curl	source	trixie	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	curl	source	bookworm	`(unfixed)`	not yet assigned	Not reported	Not reported
Cpe	curl	cpe	Not reported	`8.22.0`	Not reported	NVD-CVE-2026-18924	Not reported
Ubuntu	curl	deb	noble	`8.5.0-2ubuntu10.15`	Not reported	Not reported	Not reported
Ubuntu	libcurl3t64-gnutls	deb	noble	`8.5.0-2ubuntu10.15`	Not reported	Not reported	Not reported
Ubuntu	libcurl4-doc	deb	noble	`8.5.0-2ubuntu10.15`	Not reported	Not reported	Not reported
Ubuntu	libcurl4-gnutls-dev	deb	noble	`8.5.0-2ubuntu10.15`	Not reported	Not reported	Not reported
Ubuntu	libcurl4-openssl-dev	deb	noble	`8.5.0-2ubuntu10.15`	Not reported	Not reported	Not reported
Ubuntu	libcurl4t64	deb	noble	`8.5.0-2ubuntu10.15`	Not reported	Not reported	Not reported
Alpine	curl	apk	3.23	`8.22.0-r0`	Not reported	ALPINE-CVE-2026-18924	Not reported
Alpine	curl	apk	3.24	`8.22.0-r0`	Not reported	ALPINE-CVE-2026-18924	Not reported

Notes

[trixie] curl: Minor issue [bookworm] curl: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[curl]Affected
Details (6)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · amd64 · bookworm-backports
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · arm64 · bookworm-backports
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
[libcurl3-gnutls]Affected
Source package: [curl]
Details (6)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · amd64 · bookworm-backports
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · arm64 · bookworm-backports
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
[libcurl3-nss]Affected
Source package: [curl]
Details (4)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
[libcurl4]Affected
Source package: [curl]
Details (6)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · amd64 · bookworm-backports
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · arm64 · bookworm-backports
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
[libcurl4-doc]Affected
Source package: [curl]
Details (6)
- 7.88.1-10+deb12u15 · all · bookworm
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 7.88.1-10+deb12u15 · all · bookworm
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · all · bookworm-backports
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · all · bookworm-backports
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 7.88.1-10+deb12u5 · all · bookworm-security
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 7.88.1-10+deb12u5 · all · bookworm-security
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
[libcurl4-gnutls-dev]Affected
Source package: [curl]
Details (6)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · amd64 · bookworm-backports
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · arm64 · bookworm-backports
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
[libcurl4-nss-dev]Affected
Source package: [curl]
Details (4)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
[libcurl4-openssl-dev]Affected
Source package: [curl]
Details (6)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · amd64 · bookworm-backports
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 8.14.1-2+deb13u2~bpo13+1 · arm64 · bookworm-backports
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Affected
  usn · curl · debian · bookworm; usn · curl · debian · 12

[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

Observed: Oct 27, 2026, 7:13:12 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)]