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MEDIUM severity

Buildbot Cross-site scripting (XSS) vulnerabilityGHSA-jqqh-999x-w26w

MEDIUMFix: buildbot/buildbot@a08ee48

GHSA-jqqh-999x-w26w is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in buildbot. A fix is available for buildbot — see the affected versions and patch details below.

Also known asCVE-2009-2959PYSEC-2009-1
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 4, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
2.0%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs81th percentile — riskier than 81% of all scored CVEsHighest risk
0.00%0.84%1.67%2.51%0.5%2.0%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐍buildbot

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

Cross-site scripting (XSS) vulnerability in the waterfall web status view (status/web/waterfall.py) in Buildbot 0.7.6 through 0.7.11p1 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐍PyPIbuildbot≥ 0.7.6&&< 0.7.11p30.7.11p3pip install --upgrade 'buildbot==0.7.11p3'

Affected Products

1 product · 8 configurations
Application
buildbotbuildbot
8 versions
0.7.60.7.70.7.80.7.90.7.100.7.10p10.7.110.7.11p1

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for buildbot, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update buildbot to 0.7.11p3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-jqqh-999x-w26w is resolved across your whole dependency graph.

  3. Workarounds

    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

Cross-site scripting (XSS) vulnerability in the waterfall web status view (`status/web/waterfall.py`) in Buildbot 0.7.6 through 0.7.11p1 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.
O3 Security · Impact-Aware SCA

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Buildbot Cross-site scripting (XSS) vulnerability