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CVE-2023-49286

25
FAUCET Score

CVE-2023-49286 is a Denial of Service vulnerability affecting Squid caching proxy versions prior to 6.5. This flaw, stemming from an incorrect check of a function return value, allows unauthenticated attackers to disrupt Squid's helper process management. Rated High severity (CVSS 7.5), it requires no user interaction and has a significant impact on availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 6.4CPE matchmatch criteria
cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.6HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
4.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
10.35%
Probability of exploitation in next 30 days
EPSS Percentile
95.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.1035 is in the 93rd percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (14)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: squid-7:3.5.20-17.el7_9.10
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: squid:4-8090020231207155957.a75119d5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.2 Advanced Update SupportFixed in: squid:4-8020020240122164331.4cda2c84
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.2 Telecommunications Update ServiceFixed in: squid:4-8020020240122164331.4cda2c84
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.2 Update Services for SAP SolutionsFixed in: squid:4-8020020240122164331.4cda2c84
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportFixed in: squid:4-8040020240122165847.522a0ee4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Telecommunications Update ServiceFixed in: squid:4-8040020240122165847.522a0ee4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Update Services for SAP SolutionsFixed in: squid:4-8040020240122165847.522a0ee4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.6 Extended Update SupportFixed in: squid:4-8060020231222131040.ad008a3a
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.8 Extended Update SupportFixed in: squid:4-8080020231222130009.63b34585
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: squid-7:5.5-6.el9_3.5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.0 Extended Update SupportFixed in: squid-7:5.2-1.el9_0.4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.2 Extended Update SupportFixed in: squid-7:5.5-5.el9_2.3
View patch

Vendor Advisories (1)

redhatCVE-2023-49286Important

squid: Incorrect Check of Function Return Value In Helper Process management

Dec 4, 2023

References

github.com / squid-cache/squid/commit/6014c6648a2a54a4ecb7f952ea1163e0798f9264
Patch
github.com / squid-cache/squid/security/advisories/GHSA-xggx-9329-3c27
Vendor Advisory
lists.debian.org / debian-lts-announce/2024/01/msg00003.html
lists.fedoraproject.org / archives/list/[email protected]/message/A5QASTMCUSUEW3UOMKHZJB3FTONWSRXS
lists.fedoraproject.org / archives/list/[email protected]/message/MEV66D3PAAY6K7TWDT3WZBLCPLASFJDC
security.netapp.com / advisory/ntap-20240119-0004
squid-cache.org / Versions/v6/SQUID-2023_8.patch
Broken Link