Summary
The podman tool manages pods, container images, and containers. It is part of the libpod library, which is for applications that use container pods. Container pods is a concept in Kubernetes.
Security Fix(es):
* podman: Go crypto/x509: Certificate validation bypass due to incorrect DNS constraint application (CVE-2026-33810)
* podman: Go net/[http:](http:) Unencrypted HTTP/2 connections vulnerable to Denial of Service (CVE-2026-56853)
* podman: Go encoding/asn1: Denial of Service via excessive recursion in Unmarshal (CVE-2026-33818)
* podman: golang net/url: Denial of Service from quadratic complexity in path resolution (CVE-2026-56860)
* podman: Go: Denial of Service via XML decoding recursion depth issue (CVE-2026-56859)
* podman: Go html/template: Cross-Site Scripting via pathological input (CVE-2026-56858)
* podman: Golang crypto/tls: Denial of Service via indefinite KeyUpdate messages (CVE-2026-56862)
* podman: golang.org/x/text: Denial of Service via invalid UTF-8 input (CVE-2026-56852)
* podman: net/mail: Denial of Service via pathological email address parsing (CVE-2026-42499)
* podman: Quadlet install --replace non-truncating write retains removed host-access directives (CVE-2026-19730)
* podman: moby/go-archive: Arbitrary file write via link following in tar extraction (CVE-2026-17106)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Fixed packages 4
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux · 10 | podman | 7:5.8.2-9.el10_2.alma.1 |
| AlmaLinux · 10 | podman-docker | 7:5.8.2-9.el10_2.alma.1 |
| AlmaLinux · 10 | podman-remote | 7:5.8.2-9.el10_2.alma.1 |
| AlmaLinux · 10 | podman-tests | 7:5.8.2-9.el10_2.alma.1 |
Vulnerabilities 11
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High 7.5
Case-sensitive excludedSubtrees name constraints cause Auth Bypass in crypto/x509
When verifying a certificate chain containing excluded DNS constraints, these constraints are not correctly applied to wildcard DNS SANs which use a different case than the constraint. This only affects validation of otherwise trusted certificate chains, issu…
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High 7.5
Enforce maximum recursion depth in encoding/asn1
Enforce a recursion limit in Unmarshal to prevent stack exhaustion when parsing deeply-nested, recursive structures.
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High 7.5
Quadratic string concatenation in consumePhrase in net/mail
Pathological inputs could cause DoS through consumePhrase when parsing an email address according to RFC 5322.
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High 7.5CVE-2026-56852 Public exploit
Infinite loop on invalid input in golang.org/x/text
A norm.Iter can enter an infinite loop when handling input containing invalid UTF-8 bytes.
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High 7.5
Apply ReadHeaderTimeout when doing unencrypted HTTP/2 check in net/http
When a server is configured to support unencrypted HTTP/2, it reads a few bytes from each new connection to see if they contain the HTTP/2 client preface. ReadHeaderTimeout is unexpectedly not being applied when doing this.
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High 7.5
Add recursion depth guard during decode in encoding/xml
Previously, DecodeElement would reset the depth counter causing it to never fire; this could lead to stack exhaustion.
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High 7.5
Limit handshake messages we are willing to accept post-handshake in crypto/tls
Handshake messages, such as KeyUpdate, are always considered as state-advancing, regardless of whether a handshake has been completed or not. As a result, a malicious client can keep sending KeyUpdate messages to force the server to keep performing key deriva…
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High 7.1CVE-2026-17106 Public exploit
Tar extraction in moby/go-archive can write outside the destination directory via link following
The tar extraction routines in moby/go-archive (Unpack, UnpackLayer, Untar/UntarUncompressed, and the ApplyLayer helpers) do not confine filesystem operations to the destination directory. The extractor decides where each archive entry lands using lexical str…
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Medium 6.1
Fix Javascript regexp context tracking in html/template
Previously, pathological inputs could close an unescaped '/' early, allowing for attack-controlled data to inject arbitrary content, potentially leading to XSS.
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Medium 5.9
Avoid quadratic complexity in resolvePath in net/url
Previously, resolving relative paths containing parent directory ('..') segments performed string conversions and buffer rewrites on each step, resulting in quadratic time complexity and high memory allocation overhead. Now, path resolution operates on a byte…
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Medium 4.2
Podman: podman: quadlet install --replace non-truncating write retains removed host-access directives
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)…
References
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report
https://access.redhat.com/security/cve/CVE-2026-17106
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report
https://access.redhat.com/security/cve/CVE-2026-19730
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report
https://access.redhat.com/security/cve/CVE-2026-33810
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report
https://access.redhat.com/security/cve/CVE-2026-33818
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report
https://access.redhat.com/security/cve/CVE-2026-42499
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report
https://access.redhat.com/security/cve/CVE-2026-56852
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report
https://access.redhat.com/security/cve/CVE-2026-56853
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report
https://access.redhat.com/security/cve/CVE-2026-56858
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report
https://access.redhat.com/security/cve/CVE-2026-56859
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report
https://access.redhat.com/security/cve/CVE-2026-56860
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report
https://access.redhat.com/security/cve/CVE-2026-56862
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report
https://bugzilla.redhat.com/2456335
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report
https://bugzilla.redhat.com/2467809
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report
https://bugzilla.redhat.com/2504233
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report
https://bugzilla.redhat.com/2508234
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report
https://bugzilla.redhat.com/2515815
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report
https://bugzilla.redhat.com/2515820
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report
https://bugzilla.redhat.com/2515827
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report
https://bugzilla.redhat.com/2515838
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report
https://bugzilla.redhat.com/2515839
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report
https://bugzilla.redhat.com/2515840
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advisory
https://errata.almalinux.org/10/ALSA-2026-70201.html