Skip to main content
ExploitedIn CISA KEVFix available

CVE-2026-63077

Exploitation confirmed. First attested on 2026-08-05 by CISA-ADP, CISA KEV, GCVE · kevintel.

  • Published2026-07-27
  • Fixed in2026.1.3 · 2025.11.7
  • WeaknessCWE-502

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

In JetBrains TeamCity before 2026.1.3, 2025.11.7 unauthenticated remote code execution was possible via the agent polling protocol

Timeline

dates in UTC
  1. 2026-07-2717:16CVE publishedNVD
  2. 2026-08-05Added to the CISA KEV catalogCISA KEV
  3. 2026-08-05Listed as exploited by GCVEGCVE
  4. 2026-08-05Exploitation first reportedCISA KEV
  5. 2026-08-0517:46SSVC exploitation set to activeCISA-ADP

Observed activity

isMalicious corpus · updated 2026-11-04 09:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-63077?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-63077?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Jetbrains teamcity
BranchAffectedFixed in
2026.1≥ 2026.1, < 2026.1.32026.1.3
2025.11< 2025.11.72025.11.7

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As JetBrains, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • JetBrains TeamCityother versions: not affected
    Affected
    • < 2026.1.3, 2025.11.7fixed in 2026.1.3, 2025.11.7semver

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-07-27

Fix

  1. Update Jetbrains teamcity to 2026.1.3 · 2025.11.7
  2. CISA’s required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.due 2026-08-08

Advisories and patches

Detection

read 2026-11-03 22:42 UTC
Nuclei template
available
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
7 repositories, unverifiedunveiledhistory49/teamcity-cve-2026-63077-remediationsfewer-r7/CVE-2026-63077BoredHackerBlog/teamcity-CVE-2026-63077-pcapAnggaTechI/CVE-2026-63077bakos-sandor-nx/teamcity-cve-2026-63077-remediation
PoC-in-GitHub
Metasploit modules
1 moduleexploit/multi/http/jetbrains_teamcity_rce_cve_2026_63077rank: excellentModule metadata: Metasploit Framework, © Rapid7, Inc., BSD-3-Clause.
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2026-08-05
Patch Due Date
2026-08-08
Ransomware Use
Unknown
Required Action
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2026-07-27
Last Modified
2026-10-24
NVD status
Analyzed
GitHub Advisory
GHSA-94gx-v738-fx9w

Frequently asked questions

What is CVE-2026-63077?

In JetBrains TeamCity before 2026.1.3, 2025.11.7 unauthenticated remote code execution was possible via the agent polling protocol

Is CVE-2026-63077 actively exploited?

Yes. CVE-2026-63077 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2026-08-08.

What is the CVSS score for CVE-2026-63077?

CVE-2026-63077 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Hear about the next vulnerability in your software

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this productCISA KEV additions, August 2026Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database

Sources for this record