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CVE-2023-46846

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

MEDIUM
5.3
CVSS Score
Published: November 3, 2023 at 07:33 AM UTC
Updated: June 17, 2026 at 06:31 AM UTC
9 products affected across 2 vendorsEnterprise LinuxEnterprise Linux Server AusEnterprise Linux Eus

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Severity
MEDIUM5.3
Exploit prediction
EPSS 7%
SSVC
No known exploit

Description

SQUID is vulnerable to HTTP request smuggling, caused by chunked decoder lenience, allows a remote attacker to perform Request/Response smuggling past firewall and frontend security systems.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Enterprise Linux· Red Hatrpm
95%
8.09.0
Vendor states this is fixed in 7:3.5.20-17.el7_9.13 (unaffected)
Vendor states this is fixed in 7:5.2-1.el9_0.3 (unaffected)
Vendor states this is fixed in 7:5.5-5.el9_2.1 (unaffected)
Vendor states this is fixed in 7:5.5-6.el9_3.1 (unaffected)
Vendor states this is fixed in 8020020231101135052.4cda2c84 (unaffected)
Vendor states this is fixed in 8040020231101101624.522a0ee4 (unaffected)
Vendor states this is fixed in 8060020231031165747.ad008a3a (unaffected)
Vendor states this is fixed in 8080020231030214932.63b34585 (unaffected)
Vendor states this is fixed in 8090020231030224841.a75119d5 (unaffected)
Enterprise Linux Eus· Red Hatrpm
95%
8.68.89.09.2
Enterprise Linux for Arm 64· Red Hat
95%
8.0_aarch64
Enterprise Linux for IBM Z Systems· Red Hat
95%
8.0_s390x
Enterprise Linux for Power Little Endian· Red Hat
95%
8.0_ppc64le
Enterprise Linux Server Aus· Red Hatrubygems
95%
8.28.48.69.2
Enterprise Linux Server Tus· Red Hatrubygems
95%
8.28.48.68.89.2
Squid· Squid Cache
95%
2.6 ≤ v < 6.4
Affected range stops below 6.4, so it looks safe — our inference, not a vendor statement
Cache Squid· Squid Cache
75%
2.6 ≤ v < 6.4
Affected range stops below 6.4, so it looks safe — our inference, not a vendor statement

References (16)

Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2023:6266
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2023:6267
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2023:6268
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2023:6748
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2023:6801
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2023:6803
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2023:6804
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2023:6810

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-444

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