VDB

RHSA-2026%3A4943

RHSA-2026%3A4943 PUBLISHED CVSS 5.300000190734863 MEDIUM

A flaw was found in the email module in the Python standard library. When serializing an email message, the BytesGenerator class fails to properly quote newline characters for email headers. This issue is exploitable when the LiteralHeader class is used as it does not respect email folding rules, allowing an attacker to inject email headers and potentially modify message recipients or the email body, and spoof sender information.

Risk Scores

CVSS 3.1
5.300000190734863
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected Products

VendorProductVersions
Red Hatregistry.redhat.io/rhui5/cds-rhel9@sha256:200c27e9b396276bd505c6b41127ac5eb1d94d620172cb818ae733f2a21ac524_amd64 as a component of Red Hat Update Infrastructure 5registry.redhat.io/rhui5/cds-rhel9@sha256:200c27e9b396276bd505c6b41127ac5eb1d94d620172cb818ae733f2a21ac524_amd64, registry.redhat.io/rhui5/cds-rhel9@sha256:200c27e9b396276bd505c6b41127ac5eb1d94d620172cb818ae733f2a21ac524_amd64, registry.redhat.io/rhui5/cds-rhel9@sha256:200c27e9b396276bd505c6b41127ac5eb1d94d620172cb818ae733f2a21ac524_amd64
Red Hatregistry.redhat.io/rhui5/cds-rhel9@sha256:200c27e9b396276bd505c6b41127ac5eb1d94d620172cb818ae733f2a21ac524_amd64 as a component of Red Hat Update Infrastructure 5registry.redhat.io/rhui5/cds-rhel9@sha256:200c27e9b396276bd505c6b41127ac5eb1d94d620172cb818ae733f2a21ac524_amd64, *, *
Red Hatregistry.redhat.io/rhui5/installer-rhel9@sha256:2c50c87906a1abebf427a70f401c409f1258cb55d2096f517db870ec991cfd7f_amd64 as a component of Red Hat Update Infrastructure 5*, *, *
Red HatRed Hat Update Infrastructure 5
Red Hatregistry.redhat.io/rhui5/cds-rhel9@sha256:200c27e9b396276bd505c6b41127ac5eb1d94d620172cb818ae733f2a21ac524_amd64
Red Hatregistry.redhat.io/rhui5/haproxy-rhel9@sha256:d98fd3fe5f5f9acd0efae7db19b61b864be1eb2fbe2586a1b6be2429fa2cc7a3_amd64 as a component of Red Hat Update Infrastructure 5*, *, registry.redhat.io/rhui5/haproxy-rhel9@sha256:d98fd3fe5f5f9acd0efae7db19b61b864be1eb2fbe2586a1b6be2429fa2cc7a3_amd64
Red Hatregistry.redhat.io/rhui5/rhua-rhel9@sha256:5f1fbf66fb349a7baf066a1216d39989c3b89f18ec5108b96d9643baf4856778_amd64 as a component of Red Hat Update Infrastructure 5registry.redhat.io/rhui5/rhua-rhel9@sha256:5f1fbf66fb349a7baf066a1216d39989c3b89f18ec5108b96d9643baf4856778_amd64, registry.redhat.io/rhui5/rhua-rhel9@sha256:5f1fbf66fb349a7baf066a1216d39989c3b89f18ec5108b96d9643baf4856778_amd64, *
GnuTLSGnuTLS
Red Hatregistry.redhat.io/rhui5/rhua-rhel9@sha256:5f1fbf66fb349a7baf066a1216d39989c3b89f18ec5108b96d9643baf4856778_amd64 as a component of Red Hat Update Infrastructure 5*, *, *
Red Hatregistry.redhat.io/rhui5/haproxy-rhel9@sha256:d98fd3fe5f5f9acd0efae7db19b61b864be1eb2fbe2586a1b6be2429fa2cc7a3_amd64 as a component of Red Hat Update Infrastructure 5registry.redhat.io/rhui5/haproxy-rhel9@sha256:d98fd3fe5f5f9acd0efae7db19b61b864be1eb2fbe2586a1b6be2429fa2cc7a3_amd64, registry.redhat.io/rhui5/haproxy-rhel9@sha256:d98fd3fe5f5f9acd0efae7db19b61b864be1eb2fbe2586a1b6be2429fa2cc7a3_amd64, registry.redhat.io/rhui5/haproxy-rhel9@sha256:d98fd3fe5f5f9acd0efae7db19b61b864be1eb2fbe2586a1b6be2429fa2cc7a3_amd64
Red Hatregistry.redhat.io/rhui5/cds-rhel9@sha256:200c27e9b396276bd505c6b41127ac5eb1d94d620172cb818ae733f2a21ac524_amd64 as a component of Red Hat Update Infrastructure 5
Red Hatregistry.redhat.io/rhui5/installer-rhel9@sha256:2c50c87906a1abebf427a70f401c409f1258cb55d2096f517db870ec991cfd7f_amd64 as a component of Red Hat Update Infrastructure 5registry.redhat.io/rhui5/installer-rhel9@sha256:2c50c87906a1abebf427a70f401c409f1258cb55d2096f517db870ec991cfd7f_amd64, registry.redhat.io/rhui5/installer-rhel9@sha256:2c50c87906a1abebf427a70f401c409f1258cb55d2096f517db870ec991cfd7f_amd64, registry.redhat.io/rhui5/installer-rhel9@sha256:2c50c87906a1abebf427a70f401c409f1258cb55d2096f517db870ec991cfd7f_amd64
GnuTLSgnutls

Timeline

  • Mar 18, 2026 CVE Published
  • Apr 24, 2026 Distribution Patch
  • Apr 24, 2026 Distribution Patch
  • Apr 24, 2026 Security Advisory
  • Apr 24, 2026 Security Advisory
  • Apr 24, 2026 Security Advisory
  • Apr 24, 2026 Security Advisory
  • Apr 24, 2026 Security Advisory
  • Apr 24, 2026 Security Advisory
  • Apr 24, 2026 Security Advisory
  • Apr 24, 2026 Security Advisory
  • Apr 24, 2026 Security Advisory
Open in Interactive Console →
$ Console Community · 100/wk Open console ›