CVE-2026-5314

A vulnerability was found in Nothings stb up to 1.26. Impacted is the function stbtt_InitFont_internal in the library stb_truetype.h of the component TTF File Handler. Performing a manipulation results in out-of-bounds read. Remote exploitation of the attack is possible. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS v3 4.3 MEDIUM
CVSS v2.0 5.0 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:N/I:N/A:P

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://gist.github.com/d0razi/cb31a92f3205a4373f19b7da25946848	Exploit Third Party Advisory
https://vuldb.com/submit/780558	Third Party Advisory VDB Entry
https://vuldb.com/vuln/354646	Third Party Advisory VDB Entry
https://vuldb.com/vuln/354646/cti	Permissions Required VDB Entry

Configurations

Configuration 1 (hide)

cpe:2.3:a:nothings:stb_truetype.h:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-04-01 23:17

Updated : 2026-06-17 10:58

NVD link : CVE-2026-5314

Mitre link : CVE-2026-5314

CVE.ORG link : CVE-2026-5314

JSON object : View

Products Affected

nothings

stb_truetype.h

CWE

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

CWE-125

Out-of-bounds Read

{"id": "CVE-2026-5314", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-5314", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-04-02T13:50:16.357009Z"}}], "cvssMetricV2": [{"type": "Secondary", "source": "cna@vuldb.com", "cvssData": {"version": "2.0", "baseScore": 5.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Secondary", "source": "cna@vuldb.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L", "integrityImpact": "NONE", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 2.8}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.8}], "cvssMetricV40": [{"type": "Secondary", "source": "cna@vuldb.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 2.1, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "LOW", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "PROOF_OF_CONCEPT", "providerUrgency": "NOT_DEFINED", "userInteraction": "PASSIVE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "cna@vuldb.com", "affectedData": [{"vendor": "Nothings", "modules": ["TTF File Handler"], "product": "stb", "versions": [{"status": "affected", "version": "1.0"}, {"status": "affected", "version": "1.1"}, {"status": "affected", "version": "1.2"}, {"status": "affected", "version": "1.3"}, {"status": "affected", "version": "1.4"}, {"status": "affected", "version": "1.5"}, {"status": "affected", "version": "1.6"}, {"status": "affected", "version": "1.7"}, {"status": "affected", "version": "1.8"}, {"status": "affected", "version": "1.9"}, {"status": "affected", "version": "1.10"}, {"status": "affected", "version": "1.11"}, {"status": "affected", "version": "1.12"}, {"status": "affected", "version": "1.13"}, {"status": "affected", "version": "1.14"}, {"status": "affected", "version": "1.15"}, {"status": "affected", "version": "1.16"}, {"status": "affected", "version": "1.17"}, {"status": "affected", "version": "1.18"}, {"status": "affected", "version": "1.19"}, {"status": "affected", "version": "1.20"}, {"status": "affected", "version": "1.21"}, {"status": "affected", "version": "1.22"}, {"status": "affected", "version": "1.23"}, {"status": "affected", "version": "1.24"}, {"status": "affected", "version": "1.25"}, {"status": "affected", "version": "1.26"}]}]}], "published": "2026-04-01T23:17:03.810", "references": [{"url": "https://gist.github.com/d0razi/cb31a92f3205a4373f19b7da25946848", "tags": ["Exploit", "Third Party Advisory"], "source": "cna@vuldb.com"}, {"url": "https://vuldb.com/submit/780558", "tags": ["Third Party Advisory", "VDB Entry"], "source": "cna@vuldb.com"}, {"url": "https://vuldb.com/vuln/354646", "tags": ["Third Party Advisory", "VDB Entry"], "source": "cna@vuldb.com"}, {"url": "https://vuldb.com/vuln/354646/cti", "tags": ["Permissions Required", "VDB Entry"], "source": "cna@vuldb.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "cna@vuldb.com", "description": [{"lang": "en", "value": "CWE-119"}, {"lang": "en", "value": "CWE-125"}]}], "descriptions": [{"lang": "en", "value": "A vulnerability was found in Nothings stb up to 1.26. Impacted is the function stbtt_InitFont_internal in the library stb_truetype.h of the component TTF File Handler. Performing a manipulation results in out-of-bounds read. Remote exploitation of the attack is possible. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way."}], "lastModified": "2026-06-17T10:58:47.910", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:nothings:stb_truetype.h:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9F48FE8E-19C5-4C38-AB64-1857C491714B", "versionEndIncluding": "1.26"}], "operator": "OR"}]}], "sourceIdentifier": "cna@vuldb.com"}