How severe is CVE-2026-31899?

CVE-2026-31899 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-31899 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-31899?

CVE-2026-31899 affects Courtbouillon Cairosvg. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-31899?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-31899 have an EU (EUVD) identifier?

Yes. CVE-2026-31899 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12091.

When was CVE-2026-31899 published?

CVE-2026-31899 was published on 2026-03-13 and last updated on 2026-06-17.

CVE-2026-31899

CVE-2026-31899 is a high-severity vulnerability in Courtbouillon Cairosvg with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-674.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (39th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-12091
Weakness: CWE-674
Affected product: Courtbouillon Cairosvg
Published: 2026-03-13
Last modified: 2026-06-17

Description

CairoSVG is an SVG converter based on Cairo, a 2D graphics library. Prior to Kozea/CairoSVG has exponential denial of service via recursive <use> element amplification in cairosvg/defs.py. This causes CPU exhaustion from a small input.

Frequently asked questions

What is CVE-2026-31899?: CairoSVG is an SVG converter based on Cairo, a 2D graphics library. Prior to Kozea/CairoSVG has exponential denial of service via recursive <use> element amplification in cairosvg/defs.py. This causes CPU exhaustion from a small input.
How severe is CVE-2026-31899?: CVE-2026-31899 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-31899 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-31899?: CVE-2026-31899 affects Courtbouillon Cairosvg. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-31899?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-31899 have an EU (EUVD) identifier?: Yes. CVE-2026-31899 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12091.
When was CVE-2026-31899 published?: CVE-2026-31899 was published on 2026-03-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:courtbouillon:cairosvg:*:*:*:*:*:*:*:*

More vulnerabilities in Courtbouillon Cairosvg

CVE-2023-27586 — Critical (CVSS 9.9): CairoSVG is an SVG converter based on Cairo, a 2D graphics library. Prior to version 2.7.0, Cairo can send requests to…
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