CVE-2026-57488: pupnp Integer Overflow

Description

pupnp is an SDK for development of UPnP device and control point applications. Prior to 2.0.2, raw_to_int in upnp/src/genlib/net/http/httpparser.c parses Content-Length with strtol and casts the resulting long to a 32-bit int before the caller stores it as unsigned int. On LP64 systems, values greater than INT_MAX can truncate or wrap, so the HTTP parser can accept a body length different from the declared value. A remote adjacent-network peer can use the resulting parser disagreement to leave bytes to be interpreted as another request in persistent or proxied contexts, or can make a worker wait for an extremely large body and cause denial of service. This issue is fixed in 2.0.2.

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CVSS v3.1 Score

7.1

HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

EPSS — Exploit Prediction

0.0033

Probability of exploitation

0.27%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-190 Integer Overflow

CWE-444 CWE-444

Affected Products

Vendor	Product	Versions
pupnp_project	pupnp	< 2.0.2

References

Advisories & Patches

https://github.com/pupnp/pupnp/commit/de9602aef34ff722f3630d66c9be8eaa0aa9f012 https://github.com/pupnp/pupnp/security/advisories/GHSA-g6c2-x4r9-352g https://github.com/pupnp/pupnp/security/advisories/GHSA-g6c2-x4r9-352g

Exploits

https://github.com/pupnp/pupnp/security/advisories/GHSA-g6c2-x4r9-352g https://github.com/pupnp/pupnp/security/advisories/GHSA-g6c2-x4r9-352g

Other References

https://github.com/pupnp/pupnp/releases/tag/release-2.0.2

Frequently Asked Questions

What is CVE-2026-57488? +

pupnp is an SDK for development of UPnP device and control point applications. Prior to 2.0.2, raw_to_int in upnp/src/genlib/net/http/httpparser.c parses Content-Length with strtol and casts the resulting long to a 32-bit int before the caller stores it as unsigned int. On LP64 systems, values greater than INT_MAX can truncate or wrap, so the HTTP parser can accept a body length different from the declared value. A remote adjacent-network peer can use the resulting parser disagreement to leave bytes to be interpreted as another request in persistent or proxied contexts, or can make a worker wait for an extremely large body and cause denial of service. This issue is fixed in 2.0.2. It has a CVSS v3.1 base score of 7.1 (HIGH).

How severe is CVE-2026-57488? +

CVE-2026-57488 has a CVSS v3.1 score of 7.1 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0033, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-57488? +

CVE-2026-57488 affects products from pupnp_project, specifically: pupnp. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-57488? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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