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CVE Disclosure · Cross-Language OSS

CVE-2026-31899

CairoSVG · Python

Exponential DoS — recursive amplification

CVSS7.5
SeverityHigh
ClassExponential DoS
TrackCross-Language OSS

Summary

CVE-2026-31899 is a high-severity vulnerability (CVSS 7.5) affecting CairoSVG. Written in Python. The issue is classified as Exponential DoS — recursive amplification, part of the Cross-Language OSS disclosure track on this site.

References

Authoritative sources and PoC material:

NVD↗MITRE↗PoC repo↗Vendor↗

Disclosure

Reporter
Kai Aizen (snailsploit)
Coordination
Vendor + MITRE/NVD
Status
Disclosed · CVE assigned · entry public on NVD
Track
Cross-Language OSS

About this writeup

Detailed exploitation analysis, root-cause walkthrough, and remediation guidance for this finding live in the PoC repository. For broader methodology see services and research.

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Author
Kai Aizen
Independent Adversarial · Research group. 74 published CVEs, 5 Linux kernel mainline patches, creator of AATMF / P.R.O.M.P.T / SEF, author of Adversarial Minds.
aboutservicesresearchgate
Quick facts
ID
CVE-2026-31899
Product
CairoSVG
Severity
7.5 · High
Class
Exponential DoS — recursive amplification
References: NVD · MITRE · snailsploit CVE ledger
Frequently asked

CVE-2026-31899 — questions & answers

What is CVE-2026-31899?

CVE-2026-31899 is a disclosed vulnerability (Exponential DoS — recursive amplification) in CairoSVG, coordinated through the standard CVE process by independent security researcher Kai Aizen.

Am I affected by CVE-2026-31899?

You are affected if your environment runs an unpatched version of CairoSVG. Check the upstream advisory or NVD record for the precise affected version range, then verify against your deployed version.

How do I fix CVE-2026-31899?

Upgrade CairoSVG to the version that includes the upstream fix referenced in the NVD record. If an immediate upgrade is not possible, apply the mitigation guidance from the vendor advisory and restrict exposure of the affected surface area.

What is the impact of CVE-2026-31899?

CVSS 7.5 · High. The vulnerability class is Exponential DoS — recursive amplification; consult the NVD and vendor advisory for vector details, exploitation prerequisites, and observed impact.

Where can I find authoritative references?

NVD record at https://nvd.nist.gov/vuln/detail/CVE-2026-31899, the MITRE CVE record at https://www.cve.org/CVERecord?id=CVE-2026-31899, and the vendor's security advisory page.