CVE-2026-33526

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Source
https://cve.org/CVERecord?id=CVE-2026-33526
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33526.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-33526
Aliases
  • GHSA-hpfx-h48q-gvwg
Downstream
Related
Published
2026-03-26T00:16:12.195Z
Modified
2026-04-03T08:14:26.823206048Z
Severity
  • 9.2 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H CVSS Calculator
Summary
Squid vulnerable to Denial of Service in ICP Request handling
Details

Squid is a caching proxy for the Web. Prior to version 7.5, due to heap Use-After-Free, 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. Version 7.5 contains a patch.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33526.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-416",
        "CWE-826"
    ]
}
References

Affected packages

Git / github.com/squid-cache/squid

Affected ranges

Type
GIT
Repo
https://github.com/squid-cache/squid
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
2e58fa81c730f29f6ec52ef8bd056e658e01d50c
Database specific 
{
    "versions": [
        {
            "introduced": "0"
        },
        {
            "fixed": "7.5"
        }
    ]
}

Affected versions

4.*
4.15-20210522-snapshot
4.15-20210523-snapshot
4.15-20210524-snapshot
4.15-20210525-snapshot
4.15-20210527-snapshot
5.*
5.0.6-20210522-snapshot
5.0.6-20210523-snapshot
5.0.6-20210524-snapshot
5.0.6-20210525-snapshot
5.0.6-20210527-snapshot
6.*
6.0.0-20210522-master-snapshot
6.0.0-20210523-master-snapshot
6.0.0-20210524-master-snapshot
6.0.0-20210525-master-snapshot
6.0.0-20210527-master-snapshot
Other
BASIC_TPROXY4
HISTORIC_RELEASES
M-staged-PR151
M-staged-PR161
M-staged-PR164
M-staged-PR170
M-staged-PR175
M-staged-PR176
M-staged-PR177
M-staged-PR179
M-staged-PR181
M-staged-PR182
M-staged-PR183
M-staged-PR186
M-staged-PR187
M-staged-PR189
M-staged-PR193
M-staged-PR195
M-staged-PR196
M-staged-PR198
M-staged-PR199
M-staged-PR200
M-staged-PR202
M-staged-PR206
M-staged-PR208
M-staged-PR209
M-staged-PR210
M-staged-PR211
M-staged-PR213
M-staged-PR218
M-staged-PR220
M-staged-PR221
M-staged-PR223
M-staged-PR225
M-staged-PR227
M-staged-PR228
M-staged-PR229
M-staged-PR230
M-staged-PR231
M-staged-PR232
M-staged-PR235
M-staged-PR237
M-staged-PR238
M-staged-PR239
M-staged-PR241
M-staged-PR242
M-staged-PR243
M-staged-PR252
M-staged-PR255
M-staged-PR258
M-staged-PR264
M-staged-PR266
M-staged-PR267
M-staged-PR268
M-staged-PR273
M-staged-PR274
M-staged-PR276
M-staged-PR281
M-staged-PR282
M-staged-PR285
M-staged-PR287
M-staged-PR288
M-staged-PR293
M-staged-PR294
M-staged-PR295
M-staged-PR299
M-staged-PR304
M-staged-PR306
M-staged-PR307
M-staged-PR310
M-staged-PR311
M-staged-PR314
M-staged-PR319
M-staged-PR324
M-staged-PR330
M-staged-PR342
M-staged-PR345
M-staged-PR347
M-staged-PR348
M-staged-PR351
M-staged-PR356
M-staged-PR357
M-staged-PR359
M-staged-PR362
M-staged-PR364
M-staged-PR365
M-staged-PR366
M-staged-PR370
M-staged-PR372
M-staged-PR373
M-staged-PR375
M-staged-PR376
M-staged-PR379
M-staged-PR59
M-staged-PR71
SQUID_3_0_PRE1
SQUID_3_0_PRE2
SQUID_3_0_PRE3
SQUID_3_0_PRE4
SQUID_3_0_PRE5
SQUID_3_0_PRE6
SQUID_3_0_PRE7
SQUID_3_0_RC1
SQUID_3_0_STABLE1
SQUID_3_0_STABLE10
SQUID_3_0_STABLE11
SQUID_3_0_STABLE11_RC1
SQUID_3_0_STABLE12
SQUID_3_0_STABLE13
SQUID_3_0_STABLE14
SQUID_3_0_STABLE15
SQUID_3_0_STABLE16
SQUID_3_0_STABLE16_RC1
SQUID_3_0_STABLE17
SQUID_3_0_STABLE18
SQUID_3_0_STABLE19
SQUID_3_0_STABLE2
SQUID_3_0_STABLE20
SQUID_3_0_STABLE21
SQUID_3_0_STABLE22
SQUID_3_0_STABLE23
SQUID_3_0_STABLE24
SQUID_3_0_STABLE25
SQUID_3_0_STABLE26
SQUID_3_0_STABLE3
SQUID_3_0_STABLE4
SQUID_3_0_STABLE5
SQUID_3_0_STABLE6
SQUID_3_0_STABLE7
SQUID_3_0_STABLE8
SQUID_3_0_STABLE9
SQUID_3_1_0_1
SQUID_3_1_0_10
SQUID_3_1_0_11
SQUID_3_1_0_12
SQUID_3_1_0_13
SQUID_3_1_0_14
SQUID_3_1_0_15
SQUID_3_1_0_16
SQUID_3_1_0_17
SQUID_3_1_0_18
SQUID_3_1_0_2
SQUID_3_1_0_3
SQUID_3_1_0_4
SQUID_3_1_0_5
SQUID_3_1_0_6
SQUID_3_1_0_7
SQUID_3_1_0_8
SQUID_3_1_0_9
SQUID_3_1_1
SQUID_3_1_10
SQUID_3_1_11
SQUID_3_1_12
SQUID_3_1_12_1
SQUID_3_1_12_2
SQUID_3_1_12_3
SQUID_3_1_13
SQUID_3_1_14
SQUID_3_1_15
SQUID_3_1_16
SQUID_3_1_17
SQUID_3_1_18
SQUID_3_1_19
SQUID_3_1_2
SQUID_3_1_20
SQUID_3_1_21
SQUID_3_1_22
SQUID_3_1_23
SQUID_3_1_3
SQUID_3_1_4
SQUID_3_1_5
SQUID_3_1_5_1
SQUID_3_1_6
SQUID_3_1_7
SQUID_3_1_8
SQUID_3_1_9
SQUID_3_2_0_1
SQUID_3_2_0_10
SQUID_3_2_0_11
SQUID_3_2_0_12
SQUID_3_2_0_13
SQUID_3_2_0_14
SQUID_3_2_0_15
SQUID_3_2_0_16
SQUID_3_2_0_17
SQUID_3_2_0_18
SQUID_3_2_0_19
SQUID_3_2_0_2
SQUID_3_2_0_3
SQUID_3_2_0_4
SQUID_3_2_0_5
SQUID_3_2_0_6
SQUID_3_2_0_7
SQUID_3_2_0_8
SQUID_3_2_0_9
SQUID_3_2_1
SQUID_3_2_10
SQUID_3_2_11
SQUID_3_2_12
SQUID_3_2_13
SQUID_3_2_14
SQUID_3_2_2
SQUID_3_2_3
SQUID_3_2_4
SQUID_3_2_5
SQUID_3_2_6
SQUID_3_2_7
SQUID_3_2_8
SQUID_3_2_9
SQUID_3_3_0_1
SQUID_3_3_0_2
SQUID_3_3_0_3
SQUID_3_3_1
SQUID_3_3_10
SQUID_3_3_11
SQUID_3_3_12
SQUID_3_3_13
SQUID_3_3_14
SQUID_3_3_2
SQUID_3_3_3
SQUID_3_3_4
SQUID_3_3_5
SQUID_3_3_6
SQUID_3_3_7
SQUID_3_3_8
SQUID_3_3_9
SQUID_3_4_0_1
SQUID_3_4_0_2
SQUID_3_4_0_3
SQUID_3_4_1
SQUID_3_4_10
SQUID_3_4_11
SQUID_3_4_12
SQUID_3_4_13
SQUID_3_4_14
SQUID_3_4_2
SQUID_3_4_3
SQUID_3_4_4
SQUID_3_4_4_1
SQUID_3_4_4_2
SQUID_3_4_5
SQUID_3_4_6
SQUID_3_4_7
SQUID_3_4_8
SQUID_3_4_9
SQUID_3_5_0_1
SQUID_3_5_0_2
SQUID_3_5_0_3
SQUID_3_5_0_4
SQUID_3_5_1
SQUID_3_5_10
SQUID_3_5_11
SQUID_3_5_12
SQUID_3_5_13
SQUID_3_5_14
SQUID_3_5_15
SQUID_3_5_16
SQUID_3_5_17
SQUID_3_5_18
SQUID_3_5_19
SQUID_3_5_2
SQUID_3_5_20
SQUID_3_5_21
SQUID_3_5_22
SQUID_3_5_23
SQUID_3_5_24
SQUID_3_5_25
SQUID_3_5_26
SQUID_3_5_27
SQUID_3_5_28
SQUID_3_5_3
SQUID_3_5_4
SQUID_3_5_5
SQUID_3_5_6
SQUID_3_5_7
SQUID_3_5_8
SQUID_3_5_9
SQUID_4_0_1
SQUID_4_0_10
SQUID_4_0_11
SQUID_4_0_12
SQUID_4_0_13
SQUID_4_0_14
SQUID_4_0_15
SQUID_4_0_16
SQUID_4_0_17
SQUID_4_0_18
SQUID_4_0_19
SQUID_4_0_2
SQUID_4_0_20
SQUID_4_0_21
SQUID_4_0_22
SQUID_4_0_23
SQUID_4_0_24
SQUID_4_0_25
SQUID_4_0_3
SQUID_4_0_4
SQUID_4_0_5
SQUID_4_0_6
SQUID_4_0_7
SQUID_4_0_8
SQUID_4_0_9
SQUID_4_1
SQUID_4_10
SQUID_4_11
SQUID_4_12
SQUID_4_13
SQUID_4_14
SQUID_4_15
SQUID_4_16
SQUID_4_17
SQUID_4_2
SQUID_4_3
SQUID_4_4
SQUID_4_5
SQUID_4_6
SQUID_4_7
SQUID_4_8
SQUID_4_9
SQUID_5_0_1
SQUID_5_0_2
SQUID_5_0_3
SQUID_5_0_4
SQUID_5_0_5
SQUID_5_0_6
SQUID_5_0_7
SQUID_5_1
SQUID_5_2
SQUID_5_3
SQUID_5_4
SQUID_5_4_1
SQUID_5_5
SQUID_5_6
SQUID_5_7
SQUID_5_8
SQUID_5_9
SQUID_6_0_1
SQUID_6_0_2
SQUID_6_0_3
SQUID_6_1
SQUID_6_10
SQUID_6_11
SQUID_6_12
SQUID_6_13
SQUID_6_14
SQUID_6_2
SQUID_6_3
SQUID_6_4
SQUID_6_5
SQUID_6_6
SQUID_6_7
SQUID_6_8
SQUID_6_9
SQUID_7_0_1
SQUID_7_0_2
SQUID_7_1
SQUID_7_2
SQUID_7_3
SQUID_7_4
for-libecap-v0p1
merge-candidate-3-v1
merge-candidate-3-v2
sourceformat-review-1
take00
take01
take02
take03
take04
take06
take07
take08
take09
take1
take2
BumpSslServerFirst.*
BumpSslServerFirst.take01
BumpSslServerFirst.take02
BumpSslServerFirst.take03
BumpSslServerFirst.take04
BumpSslServerFirst.take05
BumpSslServerFirst.take06
BumpSslServerFirst.take07
BumpSslServerFirst.take08
BumpSslServerFirst.take09
BumpSslServerFirst.take10

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33526.json"