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01 Record

CVE-2023-46846

Squid: request/response smuggling in http/1.1 and icap

CriticalPUBLISHEDCNA: redhat
CNA base score9.3 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
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02 Description

Squid: request/response smuggling in http/1.1 and icap

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
7.15% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 94.2% of scored records. A rank, not a probability.
NVD base score
5.3 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2023-11-03 07:33Z2 YR AGO
Last updated
2026-02-25 18:19Z8 MO AGO
Reserved
2023-10-27
Assigning CNA
redhat
Record state
PUBLISHED
Severity
Critical (CVSS 9.3)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
Weaknesses
  • CWE-444Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')Base
Data version
5.2
Document digest
216e88afbe4f727a190961dfd12ccb540e61fd228dfcc7fc9c1ced745b26885c

05 Affected products

VendorProductVersionsPlatforms
Red HatRed Hat Enterprise Linux 7 Extended Lifecycle SupportNot specified—
Red HatRed Hat Enterprise Linux 8Not specified—
Red HatRed Hat Enterprise Linux 8.1 Update Services for SAP SolutionsNot specified—
Red HatRed Hat Enterprise Linux 8.2 Advanced Update SupportNot specified—
Red HatRed Hat Enterprise Linux 8.2 Telecommunications Update ServiceNot specified—
Red HatRed Hat Enterprise Linux 8.2 Update Services for SAP SolutionsNot specified—
Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportNot specified—
Red HatRed Hat Enterprise Linux 8.4 Telecommunications Update ServiceNot specified—
Red HatRed Hat Enterprise Linux 8.4 Update Services for SAP SolutionsNot specified—
Red HatRed Hat Enterprise Linux 8.6 Extended Update SupportNot specified—
Red HatRed Hat Enterprise Linux 9Not specified—
Red HatRed Hat Enterprise Linux 9.0 Extended Update SupportNot specified—
Red HatRed Hat Enterprise Linux 6Not specified—

06 References

07 Fixed in

AlmaLinux 8

  • libecap
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1.0.1-2.module_el8.6.0+2741+01592ae8
    • Affected before 1.0.1-2.module_el8.6.0+3048+383bc947
  • libecap-devel
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1.0.1-2.module_el8.6.0+2741+01592ae8
    • Affected before 1.0.1-2.module_el8.6.0+3048+383bc947
  • squid
    Fixed

    A version is affected if any line below covers it.

    • Affected before 7:4.15-6.module_el8.8.0+3670+56cb3c8e.1.alma.1
    • Affected before 7:4.15-7.module_el8.9.0+3680+f9142978.1.alma.1

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

AlmaLinux 9

  • squid
    Fixed

    A version is affected if any line below covers it.

    • Affected before 7:5.5-5.el9_2.1
    • Affected before 7:5.5-6.el9_3.1

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 8

  • libecap
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1.0.1-2.module_el8.6.0+2741+01592ae8
    • Affected before 1.0.1-2.module_el8.6.0+3048+383bc947
  • libecap-devel
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1.0.1-2.module_el8.6.0+2741+01592ae8
    • Affected before 1.0.1-2.module_el8.6.0+3048+383bc947
  • squid
    Fixed

    A version is affected if any line below covers it.

    • Affected before 7:4.15-6.module_el8.8.0+3670+56cb3c8e.1.alma.1
    • Affected before 7:4.15-7.module_el8.9.0+3680+f9142978.1.alma.1

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 9

  • squid
    Fixed

    A version is affected if any line below covers it.

    • Affected before 7:5.5-5.el9_2.1
    • Affected before 7:5.5-6.el9_3.1

Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • squid
    Fixed in 5.7-2+deb12u1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • squid
    Fixed in 6.5-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • squid
    Fixed in 6.5-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 20.04 LTS

  • squid
    Fixed in 4.10-1ubuntu1.8

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 22.04 LTS

  • squid
    Fixed in 5.7-0ubuntu0.22.04.2

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 24.04 LTS

  • squid
    Fixed in 6.1-2ubuntu2

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 16.04 LTS

  • squid3
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 18.04 LTS

  • squid3
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.