CVE-2026-77581

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-77581
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-77581.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-77581
Aliases
  • GHSA-5xjf-rr5x-pcfj
Published
2026-09-24T15:23:18Z
Modified
2026-09-25T03:48:41Z
Severity
  • 8.6 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L CVSS Calculator
Summary
BentoPDF: SSRF in cors-proxy-worker.js via DNS-based hostname allowlist bypass
Details

BentoPDF is a client-side PDF toolkit that is self hostable. In 2.8.6 and earlier, the certificate and timestamp CORS proxy in cloudflare/cors-proxy-worker.js uses isPrivateOrReservedHost() to validate a supplied hostname separately from the DNS resolution used by fetch(targetUrl), allowing an attacker-controlled hostname to resolve to an internal or reserved destination after validation. A certificate-like path can satisfy ALLOWED_PATH_PATTERNS, and direct clients can forge the browser-oriented Origin header. Deployments without PROXY_SECRET skip the optional signature check, while the signature is an anti-abuse measure rather than a destination-security boundary. The proxy has a 10 MB response limit and can relay response bodies from reachable destinations. The advisory identifies both the official Worker deployment and self-hosted instances as impacted where the Worker execution environment can reach internal or reserved destinations. This vulnerability is fixed in 2.8.7.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-918"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77581.json"
}
References

Affected packages

Git / github.com/alam00000/bentopdf

Affected ranges

Type
GIT
Repo
https://github.com/alam00000/bentopdf
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
55915a29017a5090a6ea61e61b0f4d899f032923
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "2.8.7"
        }
    ],
    "source":  "AFFECTED_FIELD"
}

Affected versions

v0.*
v0.0.1
v1.*
v1.0.0
v1.0.1
v1.0.2
v1.1.0
v1.1.1
v1.1.2
v1.1.3
v1.1.4
v1.1.5
v1.10.0
v1.10.1
v1.10.3
v1.10.4
v1.10.5
v1.11.0
v1.11.1
v1.11.2
v1.14.0
v1.15.1
v1.15.3
v1.15.4
v1.16.0
v1.16.1
v1.2.0
v1.3.0
v1.3.1
v1.3.2
v1.4.0
v1.5.0
v1.5.1
v1.6.0
v1.6.1
v1.6.2
v1.7.0
v1.7.1
v1.7.3
v1.7.4
v1.7.5
v1.7.6
v1.7.7
v1.7.8
v1.7.9
v1.8.0
v1.8.1
v1.9.0
v2.*
v2.0.0
v2.1.0
v2.2.0
v2.2.1
v2.3.0
v2.3.1
v2.3.3
v2.4.0
v2.4.1
v2.5.0
v2.6.0
v2.7.0
v2.8.0
v2.8.1
v2.8.2
v2.8.3
v2.8.4
v2.8.5
v2.8.6

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-77581.json"