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CVE-2010-1155

Irssi before 0.8.15, when SSL is used, does not verify that the server hostname matches a domain...

6.8 MediumFix available

Irssi before 0.8.15, when SSL is used, does not verify that the server hostname matches a domain name in the subject's Common Name (CN) field or a Subject Alternative Name field of the X.509 certificate, which allows man-in-the-middle attackers to spoof IRC servers via an arbitrary certificate.

Exploit likelihood

1.56%Down 1.1 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 6.8

Irssi before 0.8.15, when SSL is used, does not verify that the server hostname matches a domain name in the subject's Common Name (CN) field or a Subject Alternative Name field of the X.509 certificate, which allows man-in-the-middle attackers to spoof IRC servers via an arbitrary certificate.

Record
CVE-2010-1155
CVSS 2.0
6.8 MediumAV:N/AC:M/Au:N/C:P/I:P/A:P
Weakness
CWE-20
Updated
2026-11-02
CVE List No score

Irssi before 0.8.15, when SSL is used, does not verify that the server hostname matches a domain name in the subject's Common Name (CN) field or a Subject Alternative Name field of the X.509 certificate, which allows man-in-the-middle attackers to spoof IRC servers via an arbitrary certificate.

Record
CVE-2010-1155
Updated
2026-11-02
EUVDEUVD-2010-1186 No score

Irssi before 0.8.15, when SSL is used, does not verify that the server hostname matches a domain name in the subject's Common Name (CN) field or a Subject Alternative Name field of the X.509 certificate, which allows man-in-the-middle attackers to spoof IRC servers via an arbitrary certificate.

Record
EUVD-2010-1186
Updated
2026-11-03
GitHub AdvisoriesGHSA-hvgv-8rp6-894g No score

Irssi before 0.8.15, when SSL is used, does not verify that the server hostname matches a domain...

Irssi before 0.8.15, when SSL is used, does not verify that the server hostname matches a domain name in the subject's Common Name (CN) field or a Subject Alternative Name field of the X.509 certificate, which allows man-in-the-middle attackers to spoof IRC servers via an arbitrary certificate.

Record
GHSA-hvgv-8rp6-894g
Weakness
CWE-20
Updated
2026-11-02
OSV No score

Irssi before 0.8.15, when SSL is used, does not verify that the server hostname matches a domain name in the subject's Common Name (CN) field or a Subject Alternative Name field of the X.509 certificate, which allows man-in-the-middle attackers to spoof IRC servers via an arbitrary certificate.

Record
CVE-2010-1155
Updated
2026-11-02
OSVDEBIAN-CVE-2010-1155 No score

Irssi before 0.8.15, when SSL is used, does not verify that the server hostname matches a domain name in the subject's Common Name (CN) field or a Subject Alternative Name field of the X.509 certificate, which allows man-in-the-middle attackers to spoof IRC servers via an arbitrary certificate.

Record
DEBIAN-CVE-2010-1155
Updated
2026-11-02
OSVopenSUSE-SU-2024:10455-1 No score

irssi-0.8.20-3.1 on GA media

These are all security issues fixed in the irssi-0.8.20-3.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:10455-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
irssi
Debian:12
 before 0.8.15-1
0.8.15-1
irssi
Debian:13
 before 0.8.15-1
0.8.15-1
irssi
Debian:14
 before 0.8.15-1
0.8.15-1
irssi
openSUSE:Tumbleweed
From an advisory covering 6 CVEs
 before 0.8.20-3.1
0.8.20-3.1

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2010-1155 is a medium vulnerability (CVSS 6.8) in Irssi, published April 16, 2010. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.56%, the 75th percentile. Fixed in irssi 0.8.15-1.

References

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