CVE-2020-28248
An integer overflow in the PngImg::InitStorage_() function of png-img before 3.1.0 leads to an under-allocation of heap memory and subsequently an exploitable heap-based buffer overflow when loading a crafted PNG file.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.22%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
An integer overflow in the PngImg::InitStorage_() function of png-img before 3.1.0 leads to an under-allocation of heap memory and subsequently an exploitable heap-based buffer overflow when loading a crafted PNG file.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 2.22% probability · 83th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-190, CWE-787
- Affected
- png-img project/png-img
- Source
- cve@mitre.org
EPSS 2.2% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/gemini-testing/png-imgProduct
- https://github.com/gemini-testing/png-img/commit/14ac462a32ca4b3b78f56502ac976d5b0222ce3dPatch, Third Party Advisory
- https://github.com/gemini-testing/png-img/compare/v3.0.0...v3.1.0Release Notes, Third Party Advisory
- https://securitylab.github.com/advisories/GHSL-2020-142-gemini-png-imgExploit, Third Party Advisory
- https://github.com/gemini-testing/png-imgProduct
- https://github.com/gemini-testing/png-img/commit/14ac462a32ca4b3b78f56502ac976d5b0222ce3dPatch, Third Party Advisory
- https://github.com/gemini-testing/png-img/compare/v3.0.0...v3.1.0Release Notes, Third Party Advisory
- https://securitylab.github.com/advisories/GHSL-2020-142-gemini-png-imgExploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.