CVE-2026-33889

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-33889
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33889.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-33889
Aliases
Published
2026-04-15T19:29:50.899Z
Modified
2026-08-05T03:32:33.686760821Z
Severity
  • 5.4 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N CVSS Calculator
Summary
ApostropheCMS: Stored XSS via CSS Custom Property Injection in `@apostrophecms/color-field` Escaping Style Tag Context
Details

ApostropheCMS is an open-source Node.js content management system. Versions 4.28.0 and prior contain a stored cross-site scripting vulnerability in the @apostrophecms/color-field module, where color values prefixed with -- bypass TinyColor validation intended for CSS custom properties, and the launder.string() call performs only type coercion without stripping HTML metacharacters. These unsanitized values are then concatenated directly into <style> tags both in per-widget style elements rendered for all visitors and in the global stylesheet rendered for editors, with the output marked as safe HTML. An editor can inject a value which closes the style tag and executes arbitrary JavaScript in the browser of every visitor to any page containing the affected widget. This enables mass session hijacking, cookie theft, and privilege escalation to administrative control if an admin views draft content. This issue has been fixed in version 4.29.0.

Database specific 
{
    "cwe_ids": [
        "CWE-79"
    ],
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33889.json",
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "fixed": "4.29.0"
                }
            ]
        }
    ]
}
References

Affected packages

Git / github.com/apostrophecms/apostrophe

Affected ranges

Type
GIT
Repo
https://github.com/apostrophecms/apostrophe
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
6a89bdb7acdb2e1e9bf1429961a6ba7f99410481
Database specific 
{
    "source": "REFERENCES"
}

Affected versions

0.*
0.1.1
0.1.10
0.1.11
0.1.12
0.1.13
0.1.14
0.1.2
0.1.3
0.1.4
0.1.5
0.1.6
0.1.7
0.1.8
0.1.9
0.2.0
0.3.0
0.3.1
0.3.10
0.3.11
0.3.12
0.3.15
0.3.16
0.3.18
0.3.19
0.3.2
0.3.3
0.3.4
0.3.5
0.3.6
0.3.7
0.3.8
0.3.9
0.4.1
0.4.10
0.4.100
0.4.101
0.4.102
0.4.104
0.4.11
0.4.110
0.4.111
0.4.112
0.4.113
0.4.114
0.4.115
0.4.116
0.4.117
0.4.118
0.4.119
0.4.12
0.4.120
0.4.121
0.4.122
0.4.123
0.4.124
0.4.125
0.4.13
0.4.14
0.4.15
0.4.16
0.4.18
0.4.184
0.4.19
0.4.2
0.4.20
0.4.21
0.4.22
0.4.23
0.4.24
0.4.25
0.4.26
0.4.27
0.4.28
0.4.29
0.4.3
0.4.30
0.4.31
0.4.32
0.4.33
0.4.34
0.4.35
0.4.37
0.4.4
0.4.40
0.4.41
0.4.42
0.4.43
0.4.44
0.4.45
0.4.46
0.4.47
0.4.5
0.4.51
0.4.52
0.4.53
0.4.54
0.4.55
0.4.57
0.4.58
0.4.59
0.4.6
0.4.60
0.4.61
0.4.62
0.4.63
0.4.64
0.4.65
0.4.66
0.4.67
0.4.68
0.4.69
0.4.7
0.4.70
0.4.71
0.4.72
0.4.73
0.4.74
0.4.75
0.4.8
0.4.82
0.4.83
0.4.84
0.4.85
0.4.86
0.4.87
0.4.88
0.4.89
0.4.90
0.4.91
0.4.92
0.4.93
0.4.94
0.4.95
0.4.96
0.4.97
0.4.98
0.4.99
0.5.0
0.5.1
0.5.10
0.5.100
0.5.102
0.5.103
0.5.104
0.5.106
0.5.107
0.5.108
0.5.109
0.5.111
0.5.113
0.5.115
0.5.116
0.5.117
0.5.12
0.5.120
0.5.121
0.5.124
0.5.125
0.5.126
0.5.127
0.5.128
0.5.13
0.5.130
0.5.131
0.5.133
0.5.134
0.5.135
0.5.136
0.5.138
0.5.14
0.5.141
0.5.142
0.5.143
0.5.144
0.5.145
0.5.146
0.5.148
0.5.149
0.5.150
0.5.151
0.5.155
0.5.156
0.5.157
0.5.158
0.5.159
0.5.16
0.5.165
0.5.167
0.5.168
0.5.169
0.5.17
0.5.178
0.5.179
0.5.180
0.5.181
0.5.183
0.5.187
0.5.188
0.5.189
0.5.19
0.5.190
0.5.191
0.5.192
0.5.193
0.5.194
0.5.197
0.5.198
0.5.199
0.5.2
0.5.20
0.5.201
0.5.202
0.5.203
0.5.204
0.5.205
0.5.206
0.5.207
0.5.208
0.5.21
0.5.213
0.5.215
0.5.216
0.5.217
0.5.218
0.5.219
0.5.22
0.5.221
0.5.222
0.5.223
0.5.224
0.5.226
0.5.227
0.5.228
0.5.229
0.5.23
0.5.230
0.5.24
0.5.240
0.5.241
0.5.242
0.5.244
0.5.245
0.5.246
0.5.247
0.5.248
0.5.249
0.5.25
0.5.250
0.5.251
0.5.252
0.5.253
0.5.254
0.5.26
0.5.269
0.5.27
0.5.270
0.5.271
0.5.272
0.5.273
0.5.275
0.5.276
0.5.278
0.5.279
0.5.28
0.5.280
0.5.281
0.5.282
0.5.283
0.5.284
0.5.285
0.5.286
0.5.287
0.5.288
0.5.29
0.5.290
0.5.291
0.5.292
0.5.293
0.5.294
0.5.296
0.5.297
0.5.298
0.5.3
0.5.30
0.5.300
0.5.301
0.5.302
0.5.303
0.5.305
0.5.307
0.5.308
0.5.309
0.5.31
0.5.310
0.5.311
0.5.312
0.5.32
0.5.327
0.5.328
0.5.33
0.5.330
0.5.331
0.5.332
0.5.333
0.5.336
0.5.337
0.5.338
0.5.339
0.5.34
0.5.340
0.5.343
0.5.344
0.5.345
0.5.346
0.5.347
0.5.348
0.5.349
0.5.35
0.5.350
0.5.351
0.5.352
0.5.353
0.5.354
0.5.355
0.5.356
0.5.357
0.5.358
0.5.359
0.5.36
0.5.360
0.5.361
0.5.362
0.5.363
0.5.364
0.5.365
0.5.366
0.5.367
0.5.368
0.5.369
0.5.37
0.5.370
0.5.371
0.5.372
0.5.373
0.5.374
0.5.375
0.5.376
0.5.377
0.5.378
0.5.379
0.5.38
0.5.380
0.5.381
0.5.382
0.5.383
0.5.384
0.5.39
0.5.4
0.5.40
0.5.43
0.5.44
0.5.45
0.5.47
0.5.48
0.5.5
0.5.50
0.5.51
0.5.52
0.5.55
0.5.56
0.5.57
0.5.58
0.5.59
0.5.6
0.5.60
0.5.61
0.5.63
0.5.64
0.5.65
0.5.67
0.5.68
0.5.69
0.5.7
0.5.70
0.5.71
0.5.75
0.5.76
0.5.77
0.5.78
0.5.79
0.5.8
0.5.82
0.5.84
0.5.85
0.5.86
0.5.88
0.5.89
0.5.9
0.5.90
0.5.91
0.5.92
0.5.93
0.5.94
0.5.95
0.5.96
0.5.97
0.5.98
0.5.99
2.*
2.0.1
2.0.2
2.0.3
2.0.4
2.1.1
2.1.2
2.1.3
2.10.0
2.10.1
2.10.2
2.10.3
2.11.0
2.12.0
2.13.0
2.13.1
2.13.2
2.14.0
2.14.1
2.14.2
2.15.0
2.15.1
2.15.2
2.16.0
2.16.1
2.17.0
2.17.1
2.17.2
2.18.0
2.18.1
2.18.2
2.19.0
2.19.1
2.20.1
2.20.2
2.20.3
2.22.0
2.23.0
2.23.1
2.23.2
2.24.0
2.25.0
2.25.1
2.26.0
2.26.1
2.27.0
2.27.1
2.28.0
2.29.0
2.29.1
2.29.2
2.30.0
2.31.0
2.31.1
2.32.0
2.33.0
2.33.1
2.34.0
2.34.1
2.34.2
2.34.3
2.35.0
2.35.1
2.36.0
2.36.1
2.36.2
2.36.3
2.38.0
2.39.0
2.39.1
2.39.2
2.40.0
2.41.0
2.42.0
2.42.1
2.43.0
2.44.0
2.45.0
2.46.0
2.46.1
2.47.0
2.48.0
2.49.0
2.50.0
2.51.0
2.51.1
2.52.0
2.53.0
2.54.0
2.54.1
2.54.2
2.54.3
2.55.0
2.56.0
2.57.0
2.58.0
2.59.0
2.59.1
2.6.1
2.6.2
2.60.0
2.60.1
2.60.2
2.60.3
2.60.4
2.62.0
2.63.0
2.64.0
2.64.1
2.65.0
2.66.0
2.67.0
2.7.0
2.8.0
2.9.0
2.9.1
2.9.2
3.*
3.0.0
3.0.0-alpha.1
3.0.0-alpha.2
3.0.0-alpha.3
3.0.0-alpha.4
3.0.0-alpha.4.2
3.0.0-alpha.5
3.0.0-alpha.6.1
3.0.0-alpha.7
3.0.0-beta.1
3.0.0-beta.1.1
3.0.0-beta.2
3.0.0-beta.3
3.0.1
3.1.0
3.1.2
3.11.0
3.12.0
3.13.0
3.14.0
3.14.1
3.14.2
3.15.0
3.16.0
3.16.1
3.17.0
3.18.0
3.19.0
3.2.0
3.21.0
3.22.0
3.23.0
3.24.0
3.25.0
3.26.0
3.26.1
3.27.0
3.28.0
3.28.1
3.29.0
3.3.0
3.30.0
3.31.0
3.32.0
3.33.0
3.34.0
3.35.0
3.36.0
3.37.0
3.38.0
3.38.1
3.39.0
3.39.2
3.4.0
3.4.1
3.40.0
3.40.1
3.41.1
3.42.0
3.43.0
3.44.0
3.45.0
3.46.0
3.47.0
3.48.0
3.49.0
3.5.0
3.50.0
3.51.0
3.51.1
3.52.0
3.53.0
3.54.0
3.55.0
3.56.0
3.57.0
3.58.0
3.58.1
3.59.0
3.6.0
3.60.0
3.60.1
3.61.0
3.62.0
3.63.1
3.7.0
3.8.0
3.8.1
3.9.0
4.*
4.0.0
4.1.0
4.1.1
4.10.0
4.11.0
4.11.2
4.12.0
4.13.0
4.14.0
4.15.0
4.16.0
4.17.0
4.17.1
4.18.0
4.19.0
4.2.0
4.20.0
4.21.0
4.22.0
4.23.0
4.24.0
4.3.0
4.4.0
4.4.1
4.4.2
4.4.3
4.5.0
4.5.2
4.5.3
4.6.0
4.7.0
4.8.0
4.9.0
@apostrophecms/ai-helper@1.*
@apostrophecms/ai-helper@1.0.0-beta.11
@apostrophecms/apostrophe-astro@1.*
@apostrophecms/apostrophe-astro@1.10.0
@apostrophecms/apostrophe-astro@1.8.0
@apostrophecms/apostrophe-astro@1.9.0
@apostrophecms/cli@3.*
@apostrophecms/cli@3.6.0
@apostrophecms/form@1.*
@apostrophecms/form@1.5.3
@apostrophecms/import-export@3.*
@apostrophecms/import-export@3.5.1
@apostrophecms/import-export@3.5.2
@apostrophecms/import-export@3.5.3
@apostrophecms/login-totp@1.*
@apostrophecms/login-totp@1.3.3
@apostrophecms/openapi-generator@1.*
@apostrophecms/openapi-generator@1.0.0
@apostrophecms/seo@1.*
@apostrophecms/seo@1.4.0
@apostrophecms/seo@1.4.1
@apostrophecms/sitemap@1.*
@apostrophecms/sitemap@1.3.0
apostrophe@4.*
apostrophe@4.25.0
apostrophe@4.26.0
apostrophe@4.28.0
apostrophecms-openapi@1.*
apostrophecms-openapi@1.1.0
postcss-viewport-to-container-toggle@2.*
postcss-viewport-to-container-toggle@2.2.0
postcss-viewport-to-container-toggle@2.3.0
sanitize-html@2.*
sanitize-html@2.17.1
sanitize-html@2.17.2
uploadfs@1.*
uploadfs@1.26.1
v0.*
v0.4.68

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33889.json"