CVE-2026-59794: In JetBrains TeamCity before 2026.1.2 stored XSS on the cloud profile page was possible via agent-reported dat

Q: How do I fix CVE-2026-59794?

teamcity: upgrade to 2026.1.2. Exact commands for each OS are on this page.

Q: Is CVE-2026-59794 being exploited?

CVE-2026-59794 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-59794 affect?

CVE-2026-59794 affects teamcity. Severity is high (CVSS 7.3). In JetBrains TeamCity before 2026.1.2 stored XSS on the cloud profile page was possible via agent-reported data

Routine

HIGH 7.3UPGRADE

CVE-2026-59794 is a high-severity flaw (CVSS 7.3) affecting teamcity. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In JetBrains TeamCity before 2026.1.2 stored XSS on the cloud profile page was possible via agent-reported data

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.3 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.3% (top 76%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-07-10
Last modified	2026-10-24

Publisher (CNA): JetBrains s.r.o. · Vendor: jetbrains

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-10 15:16 UTCPublished CVE record published
2026-10-24 23:10 UTCUpdated Record last modified

jetbrains teamcity UPGRADE

Affected: < 2026.1.2

Fixed in: 2026.1.2

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 2026.1.2 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade teamcity

Note

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

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-2026-59794?

teamcity: upgrade to 2026.1.2. Exact commands for each OS are on this page.

Is CVE-2026-59794 being exploited?

CVE-2026-59794 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-2026-59794 affect?

CVE-2026-59794 affects teamcity. Severity is high (CVSS 7.3). In JetBrains TeamCity before 2026.1.2 stored XSS on the cloud profile page was possible via agent-reported data

How urgent is CVE-2026-59794?

Priority 32/100. High severity

Software pages

JetBrains TeamCity vulnerabilities

Related CVEs

CVE-2026-59793 HIGH 8.8 UPGRADE In JetBrains TeamCity before 2026.1.2 arbitrary file access was possible via the Perforce VCS integration
CVE-2026-59795 HIGH 8.1 UPGRADE In JetBrains TeamCity before 2026.1.2 stored XSS via unauthenticated agent registration was possible
CVE-2026-59796 HIGH 8.1 UPGRADE In JetBrains TeamCity before 2026.1.2 pipeline modification was possible due to improper permission checks
CVE-2026-63077 CRITICAL 9.8 EXPLOITED UPGRADE JetBrains TeamCity Deserialization of Untrusted Data Vulnerability
CVE-2026-65906 HIGH 8.8 UPGRADE In JetBrains TeamCity before 2026.1.2, 2025.11.6 сode execution via Kotlin DSL sandbox escape was possible

References

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