Reference page — cumulative record through Saturday, October 3, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-19730
Red Hat Red Hat Enterprise Linux 10 — Podman: podman: quadlet install --replace non-truncating write retains removed host-access directives
AV AC PR UI S C I A CVSS EPSS %ile KEV
L H L R U L L L 4.2 .0016 5.0 —
AFFECTED
Product Versions Fixed
Red Hat Enterprise Linux 10 unspecified 7:5.8.2-9.el10_2
Red Hat Enterprise Linux 9 unspecified 6:5.8.2-7.el9_8
Red Hat Ansible Automation Platform 2 unspecified —
Red Hat Ansible Automation Platform 2 unspecified —
Red Hat Ansible Automation Platform 2 unspecified —
Red Hat Ansible Automation Platform 2 unspecified —
Red Hat Enterprise Linux 8 unspecified —
Red Hat Hardened Images unspecified —
Red Hat OpenShift Container Platform 4 unspecified —
Red Hat OpenShift Dev Spaces unspecified —
+ 5 more
TIMELINE
Aug 13 Reserved by redhat
Aug 13 Published (CNA: redhat)
Sep 22 PATCH SHIPPED — CVE-2026-19730 (Red Hat Enterprise Linux 10). Fixed in Red Hat Enterprise Linux 10 7:5.8.2-9.el10_2.
Description
The 'podman quadlet install --replace' command opens the existing destination file with O_CREATE|O_WRONLY but omits O_TRUNC. When the initial reflink copy attempt fails (common on non-reflink-capable filesystems including many RHEL default XFS configurations), the fallback in ReflinkOrCopy uses io.Copy which performs a non-truncating write. If the original Quadlet is larger than the new Quadlet, the file is not truncated and content from the original is preserved. The command completes with no warning.
There is no risk of information leakage as the user already had access to the Quadlet in order to replace it, and in most cases, this would only lead to invalid Quadlet files. However, security-related options from the end of the old Quadlet could be included in the new Quadlet, and if the truncation resulted in a valid Quadlet file, this could result in undesirable behavior. For example, running podman quadlet install --replace to remove a single line from the end of a Quadlet - including security-sensitive content, like AddCapability - will fail, and the option will continue to be used. Further, with Volume Quadlets, this can include additional mounts which can cause content to be unintentionally exposed into containers. If, later, the image is updated then compromised content might be leaked to an attacker.
The vulnerable code paths are in pkg/domain/infra/abi/quadlet.go (lines 338-360, O_CREATE|O_WRONLY without O_TRUNC) and vendor/go.podman.io/storage/pkg/fileutils/reflink_linux.go (lines 12-19, non-truncating io.Copy fallback).
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| August 13, 2026 | Reserved | Reserved by redhat |
| August 13, 2026 | Published | Published (CNA: redhat) |
| September 22, 2026 | PATCH SHIPPED | PATCH SHIPPED — CVE-2026-19730 (Red Hat Enterprise Linux 10). Fixed in Red Hat Enterprise Linux 10 7:5.8.2-9.el10_2. |
Affected
Affected products and packages — 15 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| Red Hat | Red Hat Enterprise Linux 10 | — | — | 7:5.8.2-9.el10_2 |
| Red Hat | Red Hat Enterprise Linux 9 | — | — | 6:5.8.2-7.el9_8 |
| Red Hat | Red Hat Ansible Automation Platform 2 | — | — | — |
| Red Hat | Red Hat Ansible Automation Platform 2 | — | — | — |
| Red Hat | Red Hat Ansible Automation Platform 2 | — | — | — |
| Red Hat | Red Hat Ansible Automation Platform 2 | — | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — | — |
| Red Hat | Red Hat Hardened Images | — | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — | — |
| Red Hat | Red Hat OpenShift Dev Spaces | — | — | — |
| Red Hat | Red Hat OpenShift Dev Spaces | — | — | — |
| Red Hat | Red Hat OpenShift Dev Spaces | — | — | — |
| Red Hat | Red Hat OpenShift Virtualization 4 | — | — | — |
| Red Hat | Red Hat Quay 3 | — | — | — |
| Red Hat | Red Hat Quay 3 | — | — | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-19730 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Saturday, October 3, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
