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CVE-2026-45742— Gotenberg: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSS 7.5 · High EPSS 0.50% · P41

Affected Version Matrix 1

VendorProductVersion RangeStatus
gotenberggotenberg>= 8.10.0, < 8.33.0affected
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I. Basic Information for CVE-2026-45742

Vulnerability Information
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Vulnerability Title
Gotenberg: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Source: CVE Program / CVE List V5
Vulnerability Description
Gotenberg is a Docker-powered stateless API for PDF files. From 8.10.0 until 8.33.0, the newContext function in pkg/modules/api/context.go starts one errgroup.Go goroutine for each multipart downloadFrom entry and allows those goroutines to concurrently write to the shared ctx.files, ctx.diskToOriginal, and ctx.filesByField maps and slices. Go maps and slices are not safe for concurrent mutation, so a crafted multipart request containing many downloadFrom entries can trigger a data race and terminate the process with a fatal concurrent map writes runtime error. The default configuration enables downloadFrom and disables authentication, allowing an unauthenticated remote attacker to crash an exposed conversion service and cause a denial of service. This issue is fixed in version 8.33.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用共享资源的并发执行不恰当同步问题(竞争条件)
Source: CVE Program / CVE List V5
Vulnerability Title
Gotenberg 竞争条件问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Gotenberg是Gotenberg团队开源的一个文档转换应用服务器。 Gotenberg 8.10.0版本至8.33.0之前版本存在竞争条件问题漏洞，该漏洞源于newContext函数中多个goroutine并发写入共享map和slice导致数据竞争，可能允许未经身份验证的远程攻击者通过特制multipart请求使转换服务崩溃，造成拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
gotenberggotenberg >= 8.10.0, < 8.33.0 -

II. Public POCs for CVE-2026-45742

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 8969 chars
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III. Intelligence Information for CVE-2026-45742

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Patches & Fixes for CVE-2026-45742 (1)

Vendor Advisories for CVE-2026-45742 (1)

Vendor Pages for CVE-2026-45742 (1)

Same Patch Batch · gotenberg · 2026-08-19 · 3 CVEs total

CVE-2026-448298.8 HIGHGotenberg: Path traversal in zip entry name via Windows-style separators in upload filenam
CVE-2026-457417.5 HIGHGotenberg: SSRF deny-list bypass in IsPublicIP via IPv6 6to4 / NAT64 / site-local prefixes

IV. Related Vulnerabilities

Same product: gotenberg
Same vendor: gotenberg
Same weakness: CWE-362

V. Comments for CVE-2026-45742

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