01 Record
CVE-2026-114713
The labeled-response module in UnrealIRCd 6.0.0 before 6.2.7.1 does not escape the IRCv3 "label" message tag when echoing it into replies, which allows any user on a network with two or more linked
HighKEVPUBLISHEDCNA: mitre
CNA base score8.6 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
02 Description
The labeled-response module in UnrealIRCd 6.0.0 before 6.2.7.1 does not escape the IRCv3 "label" message tag when echoing it into replies, which allows any user on a network with two or more linked
03 Exploitation and scoring
- Exploitation
- Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2026-11-13. Federal remediation due 2026-11-16.
- SSVC decision
- ExploitationactiveCISA reports credible evidence of active exploitation.
- AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
- Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
- EPSS probability
- 0.30% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 23.1% of scored records. A rank, not a probability.
- NVD base score
- 8.6 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
- NVD analysis status
- Undergoing Analysis. NVD last modified this record on 2026-11-13.
- Red Hat severity
- Important. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-11-08 02:31Z5 DAYS AGO
- Last updated
- 2026-11-13 20:58Z3 HR AGO
- Reserved
- 2026-10-22
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- High (CVSS 8.6)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
- Weaknesses
- CWE-140Improper Neutralization of DelimitersBase
- Data version
- 5.2
- Document digest
- 3625fbf4d4a80a164d67aa376a35e80338d80f008c6162e29f02831406da1ae2
05 Affected products
VendorProductVersionsPlatforms
06 References
- www.unrealircd.orghttps://www.unrealircd.org/
- www.unrealircd.orghttps://www.unrealircd.org/index/news
- forums.unrealircd.orghttps://forums.unrealircd.org/viewtopic.php?t=9487
- www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/11/08/1
- www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-114713
07 Remediation
Upgrade to UnrealIRCd 6.2.7.1 or later. Alternatively, apply the hot-patch to fix the issue without restart: ./unrealircd hot-patch bundle-20261107