CVE-2026-55696

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Source

https://cve.org/CVERecord?id=CVE-2026-55696

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55696.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-55696

Aliases

GHSA-f2xf-7x3g-4272

Published

2026-08-28T20:20:53.934Z

Modified

2026-08-30T03:46:56.367627432Z

Severity

4.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N CVSS Calculator

Summary

PrivateBin: Stored Cross-Side-Scripting (XSS) vulnerability in attachment download link via dangerous MIME types with required user-interaction

Details

PrivateBin is an online pastebin where the server has zero knowledge of pasted data. Prior to 2.0.5, AttachmentViewer.setAttachment in js/privatebin.js uses getAttachmentMimeType to accept attacker-controlled MIME types and uses getBlobUrl to create a same-origin blob before setting attachmentLink's href for the Download attachment link. The SVG-only sanitization branch updates only the preview blob, so text/html, image/svg, application/xhtml+xml, and text/xml attachments can remain active in the download blob. On an instance with fileupload = true and a weakened, stripped, or absent Content Security Policy, an anonymous attacker can create such an attachment, and a victim who opens the link in a new tab causes inline JavaScript to execute in the PrivateBin origin. The script can read origin-scoped local storage and issue same-origin requests, including requests to applications co-hosted on the same domain. This issue is fixed in version 2.0.5.

Database specific

{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55696.json",
    "cwe_ids": [
        "CWE-79",
        "CWE-80"
    ],
    "cna_assigner": "GitHub_M"
}

References

Affected packages

Git / github.com/privatebin/privatebin

Affected ranges

Type

GIT

Repo

https://github.com/privatebin/privatebin

Events

Introduced

Fixed

7f1f40853efe0eb12db9cc4a30ea8524ac00f423

Fixed

3035d6e5d3cceb7f06f7b7bb80968727879c52b0

Database specific

Show details

{
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "2.0.5"
        }
    ]
}

Affected versions

0.*

0.18

0.19

0.20

0.21

0.21.1

0.22

1.*

1.0

1.1

1.2.1

1.3

1.3.1

1.3.2

1.3.3

1.3.4

1.3.5

1.4.0

1.5.0

1.5.1

1.5.2

1.6.0

1.6.1

1.6.2

1.7.0

1.7.1

1.7.2

1.7.3

1.7.5

1.7.6

1.7.7

1.7.8

2.*

2.0.0

2.0.1

2.0.2

2.0.3

2.0.4

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55696.json"