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NVD / CVE Program· CNA redhat

CVE-2026-19730: Podman: podman: quadlet install --replace non-truncating write retains removed host-access directives

Noroxi assessment

Priority: Monitor (action score 16/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.13% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. A user must open a link or visit a page. Special conditions such as timing or configuration are required.
  • Fixed version: podman (AlmaLinux:10) 7:5.8.2-9.el10_2.alma.1; podman-docker (AlmaLinux:10) 7:5.8.2-9.el10_2.alma.1; podman-remote (AlmaLinux:10) 7:5.8.2-9.el10_2.alma.1.

Low priority for now. Upgrade to podman (AlmaLinux:10) 7:5.8.2-9.el10_2.alma.1; podman-docker (AlmaLinux:10) 7:5.8.2-9.el10_2.alma.1; podman-remote (AlmaLinux:10) 7:5.8.2-9.el10_2.alma.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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).

MediumCVSS 4.2 · v3.1—No exploit Fix available
Published
Aug 13, 2026
Updated
Nov 5, 2026
EPSS
0.1% · 2th percentile

Report tools

JSON

Action score

16

Monitor

Low priority for now.

CVSS
16 / 40 · 4.2 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
proof of concept
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · redhat
4.2
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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  • when exploit code appears or is weaponized
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  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • Red Hat Red Hat Ansible Automation Platform 2

    • all versionsunknown
    • all versionsunknown
    • all versionsunknown
    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 10

    • 7:5.8.2-9.el10_2 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8

    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 9

    • 6:5.8.2-7.el9_8 and laternot affected · rpm

  • Red Hat Red Hat Hardened Images

    • all versionsunknown

  • Red Hat Red Hat OpenShift Container Platform 4

    • all versionsunknown

  • Red Hat Red Hat OpenShift Container Platform 5

    • all versionsunknown

  • Red Hat Red Hat OpenShift Dev Spaces

    • all versionsunknown
    • all versionsunknown
    • all versionsunknown

  • Red Hat Red Hat OpenShift Virtualization 4

    • all versionsunknown

  • Red Hat Red Hat Quay 3

    • all versionsunknown
    • all versionsunknown

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:10podmanbefore 7:5.8.2-9.el10_2.alma.17:5.8.2-9.el10_2.alma.1
AlmaLinux:10podman-dockerbefore 7:5.8.2-9.el10_2.alma.17:5.8.2-9.el10_2.alma.1
AlmaLinux:10podman-remotebefore 7:5.8.2-9.el10_2.alma.17:5.8.2-9.el10_2.alma.1
AlmaLinux:10podman-testsbefore 7:5.8.2-9.el10_2.alma.17:5.8.2-9.el10_2.alma.1
AlmaLinux:9podmanbefore 6:5.8.2-7.el9_86:5.8.2-7.el9_8
AlmaLinux:9podman-dockerbefore 6:5.8.2-7.el9_86:5.8.2-7.el9_8
AlmaLinux:9podman-pluginsbefore 6:5.8.2-7.el9_86:5.8.2-7.el9_8
AlmaLinux:9podman-remotebefore 6:5.8.2-7.el9_86:5.8.2-7.el9_8
AlmaLinux:9podman-testsbefore 6:5.8.2-7.el9_86:5.8.2-7.el9_8
Alpine:v3.24podmanbefore 5.8.6-r05.8.6-r0
Debian:14podmanbefore 5.8.6+ds1-15.8.6+ds1-1
Gogithub.com/containers/podmanfrom 0—
Gogithub.com/containers/podman/v2from 0—
Gogithub.com/containers/podman/v3from 0—
Gogithub.com/containers/podman/v4from 0—
Gogithub.com/containers/podman/v5from 5.7.0 · before 5.8.65.8.6
Red Hat:enterprise_linux:10.2podmanbefore 7:5.8.2-9.el10_27:5.8.2-9.el10_2
Red Hat:enterprise_linux:10.2podman-debuginfobefore 7:5.8.2-9.el10_27:5.8.2-9.el10_2
Red Hat:enterprise_linux:10.2podman-debugsourcebefore 7:5.8.2-9.el10_27:5.8.2-9.el10_2
Red Hat:enterprise_linux:10.2podman-dockerbefore 7:5.8.2-9.el10_27:5.8.2-9.el10_2
Red Hat:enterprise_linux:10.2podman-remotebefore 7:5.8.2-9.el10_27:5.8.2-9.el10_2
Red Hat:enterprise_linux:10.2podman-remote-debuginfobefore 7:5.8.2-9.el10_27:5.8.2-9.el10_2
Red Hat:enterprise_linux:10.2podman-testsbefore 7:5.8.2-9.el10_27:5.8.2-9.el10_2
Red Hat:enterprise_linux:10.2podman-tests-debuginfobefore 7:5.8.2-9.el10_27:5.8.2-9.el10_2

+12

Same product

red hat: all records

Other highest-scoring records for the same primary product.

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    52Plan
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    44Plan
  • CVE-2026-76578Ipa: freeipa: freeipa: unauthenticated ldap client can obtain administrator credentials via the self-managed-token aci
    39Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2026-72694Aug 11, 2026 · Mrtg: mrtg daemon symlink-following chown allows local privilege escalation via pid file path manipulation
    28Monitor
  • ← EarlierCVE-2026-19546Aug 11, 2026 · Dbi: incomplete fix for cve-2026-14380 dbi: arbitrary code execution via caller-influenced profile attribute
    35Monitor
  • Later →CVE-2026-75032Aug 18, 2026 · Bluez: bluez: out-of-bounds read in avrcp parse_media_element and parse_media_folder
    25Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
almalinux:podman6:5.8.2-7.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:podman-docker6:5.8.2-7.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:podman-plugins6:5.8.2-7.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:podman-remote6:5.8.2-7.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:podman-tests6:5.8.2-7.el9_8 · AlmaLinux:9Package registry (OSV)
alpine:podman5.8.6-r0 · Alpine:v3.24Package registry (OSV)
debian:podman5.8.6+ds1-1 · Debian:14Package registry (OSV)
Go:github.com/containers/podman/v55.8.6Package registry (OSV)
red hat:podman6:5.8.2-7.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:podman-debuginfo6:5.8.2-7.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:podman-debugsource6:5.8.2-7.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:podman-docker6:5.8.2-7.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:podman-plugins6:5.8.2-7.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:podman-plugins-debuginfo6:5.8.2-7.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:podman-remote6:5.8.2-7.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:podman-remote-debuginfo6:5.8.2-7.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:podman-tests6:5.8.2-7.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:podman-tests-debuginfo6:5.8.2-7.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
rocky linux:podman6:5.8.2-7.el9_8 · Rocky Linux:9Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • A user must open a link or visit a page.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
low · data can be read
Integrity
low · data or configuration can be modified
Availability
low · the service can be disrupted
Attack vector
Local
Attack complexity
High
Privileges required
Low
User interaction
Required
Scope
Unchanged
Confidentiality impact
Low
Integrity impact
Low
Availability impact
Low

Weakness class (CWE)

CWE-459 · Incomplete Cleanup

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓
  2. SSVC exploitation— → poc

For records you follow, these changes also arrive as notifications. →

References

Show all references (5 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records