CVE-2023-26991

Name: CVE-2023-26991
Creator: NVD / NIST
Published: 2023-04-04T15:15:09.183+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.31%

Last modified Jun 17, 2026

CVE-2023-26991 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. SWFTools v0.9.2 was discovered to contain a stack-use-after-scope in the swf_ReadSWF2 function in lib/rfxswf.c.. EPSS estimates a 0.31% chance of exploitation in the next 30 days.

Description

SWFTools v0.9.2 was discovered to contain a stack-use-after-scope in the swf_ReadSWF2 function in lib/rfxswf.c.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

0.31%

22.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Swftools	Swftools	0.9.2

References

https://github.com/matthiaskramm/swftools/issues/196Exploit, Issue Tracking, Third Party Advisory
https://github.com/matthiaskramm/swftools/issues/196Exploit, Issue Tracking, Third Party Advisory

Timeline

Published: Apr 4, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-26991?

SWFTools v0.9.2 was discovered to contain a stack-use-after-scope in the swf_ReadSWF2 function in lib/rfxswf.c.

How severe is CVE-2023-26991?

CVE-2023-26991 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.31% probability of exploitation in the next 30 days.

How do I fix CVE-2023-26991?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-26991?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST