CVE-2026-103471: Corvusoft restbed · Unthrottled Resource Allocation
Affects Corvusoft restbedSource CVE Database V5
Not known to be exploited · CVSS 8.7 High.
Data as of 14 Nov 2026, 20:43 UTC
- EPSS
- 0.5% chance of exploitation in 30 days – higher than 46% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 30 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 14 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Corvusoftrestbed | Affected
| Fixed in– |
GitHubcorvusoft/restbedpkg:github/corvusoft/restbedOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Until a fix is available, consider implementing external protections such as network-level rate limiting or connection timeouts to mitigate resource exhaustion risks.
Description
CVE-2026-103471 is a high-severity vulnerability in Corvusoft restbed up to version 5.0.0 where HTTP request headers are buffered without a maximum size limit. This allows remote unauthenticated attackers to exhaust server memory by opening TCP connections and streaming bytes indefinitely without sending the header delimiter, causing unbounded heap memory allocation until the server process is terminated.
References
- github.com/Corvusoft/restbed/issues/558 (opens in a new tab)
- github.com/Corvusoft/restbed (opens in a new tab)
- github.com/Corvusoft/restbed/blob/e1227a297ce6d4e9f78222456507b29bb8ab77e9/src/corvusoft/restbed/detail/service_impl.cpp (opens in a new tab)
- github.com/Corvusoft/restbed/blob/e1227a297ce6d4e9f78222456507b29bb8ab77e9/src/corvusoft/restbed/session.cpp (opens in a new tab)
- vulncheck.com/advisories/restbed-through-5.0.0-denial-of-service-via-unbounded-header-buffering (opens in a new tab)