WeeChat before 3.2.1 allows remote attackers to cause a denial of service (crash) via a crafted WebSocket frame that trigger an out-of-bound
WeeChat before 3.2.1 allows remote attackers to cause a denial of service (crash) via a crafted WebSocket frame that trigger an out-of-bounds read in plugins/relay/relay-websocket.c in the Relay plugin.
- Published
- Sep 5, 2021
- Updated
- Jun 17, 2026
- EPSS
- 1.6% · 75th percentile
- CWE
- CWE-125
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Report tools
Action score
30
Monitor
Low priority for now.
- CVSS
- 30 / 40 · 7.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 1.6%
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| weechat | weechat | cpe:2.3:a:weechat:weechat |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- debian debian linux10.0
- weechat weechat0.4.1 and later · before 3.2.1
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | weechat | before 3.2.1-1 | 3.2.1-1 |
| Debian:9 | weechat | before 1.6-1+deb9u3 | 1.6-1+deb9u3 |
| SUSE:Package Hub 15 SP3 | weechat | before 3.2.1-bp153.2.3.1 | 3.2.1-bp153.2.3.1 |
| SUSE:Package Hub 15 SP3 | weechat | before 3.2.1-bp153.2.3.1 | 3.2.1-bp153.2.3.1 |
Same product
weechat: all recordsOther highest-scoring records for the same primary product.
- CVE-2020-9760An issue was discovered in WeeChat before 2.7.1 (0.3.4 to 2.7 are affected).40Plan
- CVE-2020-8955irc_mode_channel_update in plugins/irc/irc-mode.c in WeeChat through 2.7 allows remote attackers to cause a denial of service (buffer overfl40Plan
- CVE-2024-46613WeeChat before 4.4.2 has an integer overflow and resultant buffer overflow at core/core-string.c when there are more than two billion items 39Monitor
- CVE-2017-8073WeeChat before 1.7.1 allows a remote crash by sending a filename via DCC to the IRC plugin.31Monitor
- CVE-2026-53525WeeChat has Non-Constant-Time Password Hash Comparison in Relay Authentication29Monitor
- CVE-2026-53524WeeChat has a Decompression Bomb in Relay WebSocket (DoS)26Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:weechat | 3.2.1-1 · Debian:12 | Package registry (OSV) |
| opensuse:weechat | 3.2.1-bp153.2.3.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| suse:weechat | 3.2.1-bp153.2.3.1 · SUSE:Package Hub 15 SP3 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-21-0792 · Oct 1, 2021(Debian Güvenlik Güncellemesi)
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-125 · Out-of-bounds ReadCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
—
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- github.com/weechat/weechat/commit/8b1331f98de1714bae15a9ca2e2b393ba49d735b
- lists.debian.org/debian-lts-announce/2021/09/msg00018.html
- weechat.org/doc/security/
Vendor advisories and official records. Exploit/PoC links are deliberately left out.