CVE-2019-7313: www/resource.py in Buildbot before 1.8.1 allows CRLF injection in the Location header of /auth/login and /auth

This month

MEDIUM 6.1UPGRADE

CVE-2019-7313 is a medium-severity flaw (CVSS 6.1) affecting buildbot. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

www/resource.py in Buildbot before 1.8.1 allows CRLF injection in the Location header of /auth/login and /auth/logout via the redirect parameter. This affects other web sites in the same domain.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.9% (top 41%)
CISA exploited list	No
Weakness	CWE-93
Published	2019-02-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: buildbot

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2019-02-03 08:29 UTCPublished CVE record published
2026-06-17 02:40 UTCUpdated Record last modified

buildbot buildbot UPGRADE

Affected: >= 0.9.0 and <= 1.8.0

Fixed in: newer than 1.8.0

Safe to downgrade to: a release before 0.9.0

1. Check installed version

apt-cache policy buildbot || rpm -q buildbot || buildbot --version

2. UPGRADE to newer than 1.8.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade buildbot

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade buildbot

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 0.9.0 (Debian / Ubuntu)

apt-cache madison buildbot sudo apt install buildbot=<VERSION_BEFORE_0.9.0> sudo apt-mark hold buildbot

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list buildbot sudo dnf downgrade buildbot-<VERSION_BEFORE_0.9.0> sudo dnf versionlock add buildbot

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-7313?

buildbot: upgrade to newer than 1.8.0. Exact commands for each OS are on this page.

Is CVE-2019-7313 being exploited?

CVE-2019-7313 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-7313 affect?

CVE-2019-7313 affects buildbot. Severity is medium (CVSS 6.1). www/resource.py in Buildbot before 1.8.1 allows CRLF injection in the Location header of /auth/login and /auth/logout via the redirect parameter. This affects other web sites in the same domain.

How urgent is CVE-2019-7313?

Priority 41/100. Public exploit reference

Related CVEs

CVE-2019-12300 CRITICAL 9.8 UPGRADE Buildbot before 1.8.2 and 2.x before 2.3.1 accepts a user-submitted authorization token from OAuth and uses it

References

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