CVE-2026-59696: uri_string does not bound the port component of a URI before integer conversion
CSIRTS triage
- What
- The uri_string module does not bound the port component of a URI before integer conversion, allowing integer overflow.
- Who is affected
- Applications using Erlang/OTP's uri_string module to parse URIs with arbitrary port values.
- Urgency
- Moderate urgency depending on how parsed URIs are used; integer overflow could cause unexpected behavior.
- Action
- Update Erlang/OTP to a patched version addressing CVE-2026-59696.
AI-assisted analysis generated from the source advisory — verify against the original.
⚡ Watch uri_string
Get an email when a new uri_string advisory drops — max one per day, one-click unsubscribe.
Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-59696
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-596960.42% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 35% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-59696 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
More from Microsoft Security Response Center
- unknownCVE-2026-55951: httpc memory exhaustion via unbounded response header accumulation2026-09-02
- mediumCVE-2026-56143: Allocation of Resources Without Limits or Throttling in Elasticsearch Leading to Denial of Ser…2026-09-02
- highCVE-2026-14957: FIPS mode assertion failure via malicious CERT payload2026-09-02
- lowCVE-2026-18743: Popt-devel: popt-static: short realloc in poptconfigfiletostring2026-09-02
- unknownCVE-2026-66357: inets,httpd:HTTP Request Smuggling via obs-fold Header Continuation2026-09-02