CVE-2026-32748 (GCVE-0-2026-32748)
Vulnerability from cvelistv5 – Published: 2026-03-26 00:11 – Updated: 2026-07-15 01:07
VLAI
EPSS
VEX
Title
Squid has Denial of Service in ICP Response handling
Summary
Squid is a caching proxy for the Web. Prior to version 7.5, due to premature release of resource during expected lifetime and heap Use-After-Free bugs, Squid is vulnerable to Denial of Service when handling ICP traffic. This problem allows a remote attacker to perform a reliable and repeatable Denial of Service attack against the Squid service using ICP protocol. This attack is limited to Squid deployments that explicitly enable ICP support (i.e. configure non-zero `icp_port`). This problem _cannot_ be mitigated by denying ICP queries using `icp_access` rules. This bug is fixed in Squid version 7.5.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-26 14:19 UTC
CWE
Assigner
References
18 references
Impacted products
18 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| squid-cache | squid |
Affected:
< 7.5
|
guessed | |
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
7:6.10-6.el10_1.3 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.1 |
||
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support |
Unaffected:
7:6.10-5.el10_0.2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux_eus:10.0 |
||
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support |
Unaffected:
7:3.5.20-17.el7_9.16 , < *
(rpm)
cpe:/o:redhat:rhel_els:7 |
||
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
8100020260408092701.489197e6 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8 |
||
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support |
Unaffected:
8040020260514123440.522a0ee4 , < *
(rpm)
cpe:/a:redhat:rhel_aus:8.4 |
||
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On |
Unaffected:
8040020260514123440.522a0ee4 , < *
(rpm)
cpe:/a:redhat:rhel_eus_long_life:8.4 |
||
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support |
Unaffected:
8060020260518090356.ad008a3a , < *
(rpm)
cpe:/a:redhat:rhel_aus:8.6 |
||
| Red Hat | Red Hat Enterprise Linux 8.6 Telecommunications Update Service |
Unaffected:
8060020260518090356.ad008a3a , < *
(rpm)
cpe:/a:redhat:rhel_tus:8.6 |
||
| Red Hat | Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions |
Unaffected:
8060020260518090356.ad008a3a , < *
(rpm)
cpe:/a:redhat:rhel_e4s:8.6 |
||
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service |
Unaffected:
8080020260514105733.63b34585 , < *
(rpm)
cpe:/a:redhat:rhel_tus:8.8 |
||
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions |
Unaffected:
8080020260514105733.63b34585 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:8.8 |
||
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
7:5.5-22.el9_7.4 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 |
||
| Red Hat | Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions |
Unaffected:
7:5.2-1.el9_0.10 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:9.0 |
||
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions |
Unaffected:
7:5.5-5.el9_2.11 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:9.2 |
||
| Red Hat | Red Hat Enterprise Linux 9.4 Extended Update Support |
Unaffected:
7:5.5-13.el9_4.5 , < *
(rpm)
cpe:/a:redhat:rhel_eus:9.4 |
||
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support |
Unaffected:
7:5.5-19.el9_6.3 , < *
(rpm)
cpe:/a:redhat:rhel_eus:9.6 |
||
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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