CVE-2026-2016 (GCVE-0-2026-2016)
Vulnerability from cvelistv5 – Published: 2026-02-06 11:02 – Updated: 2026-02-06 13:08 X_Open Source
VLAI?
Title
happyfish100 libfastcommon base64.c base64_decode stack-based overflow
Summary
A security vulnerability has been detected in happyfish100 libfastcommon up to 1.0.84. Affected by this vulnerability is the function base64_decode of the file src/base64.c. The manipulation leads to stack-based buffer overflow. Local access is required to approach this attack. The exploit has been disclosed publicly and may be used. The identifier of the patch is 82f66af3e252e3e137dba0c3891570f085e79adf. Applying a patch is the recommended action to fix this issue.
Severity ?
Assigner
References
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Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| happyfish100 | libfastcommon |
Affected:
1.0.0
Affected: 1.0.1 Affected: 1.0.2 Affected: 1.0.3 Affected: 1.0.4 Affected: 1.0.5 Affected: 1.0.6 Affected: 1.0.7 Affected: 1.0.8 Affected: 1.0.9 Affected: 1.0.10 Affected: 1.0.11 Affected: 1.0.12 Affected: 1.0.13 Affected: 1.0.14 Affected: 1.0.15 Affected: 1.0.16 Affected: 1.0.17 Affected: 1.0.18 Affected: 1.0.19 Affected: 1.0.20 Affected: 1.0.21 Affected: 1.0.22 Affected: 1.0.23 Affected: 1.0.24 Affected: 1.0.25 Affected: 1.0.26 Affected: 1.0.27 Affected: 1.0.28 Affected: 1.0.29 Affected: 1.0.30 Affected: 1.0.31 Affected: 1.0.32 Affected: 1.0.33 Affected: 1.0.34 Affected: 1.0.35 Affected: 1.0.36 Affected: 1.0.37 Affected: 1.0.38 Affected: 1.0.39 Affected: 1.0.40 Affected: 1.0.41 Affected: 1.0.42 Affected: 1.0.43 Affected: 1.0.44 Affected: 1.0.45 Affected: 1.0.46 Affected: 1.0.47 Affected: 1.0.48 Affected: 1.0.49 Affected: 1.0.50 Affected: 1.0.51 Affected: 1.0.52 Affected: 1.0.53 Affected: 1.0.54 Affected: 1.0.55 Affected: 1.0.56 Affected: 1.0.57 Affected: 1.0.58 Affected: 1.0.59 Affected: 1.0.60 Affected: 1.0.61 Affected: 1.0.62 Affected: 1.0.63 Affected: 1.0.64 Affected: 1.0.65 Affected: 1.0.66 Affected: 1.0.67 Affected: 1.0.68 Affected: 1.0.69 Affected: 1.0.70 Affected: 1.0.71 Affected: 1.0.72 Affected: 1.0.73 Affected: 1.0.74 Affected: 1.0.75 Affected: 1.0.76 Affected: 1.0.77 Affected: 1.0.78 Affected: 1.0.79 Affected: 1.0.80 Affected: 1.0.81 Affected: 1.0.82 Affected: 1.0.83 Affected: 1.0.84 |
Credits
liloler (VulDB User)
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5.3, \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C\"}}, {\"cvssV3_0\": {\"version\": \"3.0\", \"baseScore\": 5.3, \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C\"}}, {\"cvssV2_0\": {\"version\": \"2.0\", \"baseScore\": 4.3, \"vectorString\": \"AV:L/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:OF/RC:C\"}}], \"affected\": [{\"vendor\": \"happyfish100\", \"product\": \"libfastcommon\", \"versions\": [{\"status\": \"affected\", \"version\": \"1.0.0\"}, {\"status\": \"affected\", \"version\": \"1.0.1\"}, {\"status\": \"affected\", \"version\": \"1.0.2\"}, {\"status\": \"affected\", \"version\": \"1.0.3\"}, {\"status\": \"affected\", \"version\": \"1.0.4\"}, {\"status\": \"affected\", \"version\": \"1.0.5\"}, {\"status\": \"affected\", \"version\": \"1.0.6\"}, {\"status\": \"affected\", \"version\": \"1.0.7\"}, {\"status\": \"affected\", \"version\": \"1.0.8\"}, {\"status\": \"affected\", \"version\": \"1.0.9\"}, {\"status\": \"affected\", \"version\": \"1.0.10\"}, {\"status\": \"affected\", \"version\": \"1.0.11\"}, {\"status\": \"affected\", \"version\": \"1.0.12\"}, {\"status\": \"affected\", \"version\": \"1.0.13\"}, {\"status\": \"affected\", \"version\": \"1.0.14\"}, {\"status\": \"affected\", \"version\": \"1.0.15\"}, {\"status\": \"affected\", \"version\": \"1.0.16\"}, {\"status\": \"affected\", \"version\": \"1.0.17\"}, {\"status\": \"affected\", \"version\": \"1.0.18\"}, {\"status\": \"affected\", \"version\": \"1.0.19\"}, {\"status\": \"affected\", \"version\": \"1.0.20\"}, {\"status\": \"affected\", \"version\": \"1.0.21\"}, {\"status\": \"affected\", \"version\": \"1.0.22\"}, {\"status\": \"affected\", \"version\": \"1.0.23\"}, {\"status\": \"affected\", \"version\": \"1.0.24\"}, {\"status\": \"affected\", \"version\": \"1.0.25\"}, {\"status\": \"affected\", \"version\": \"1.0.26\"}, {\"status\": \"affected\", \"version\": \"1.0.27\"}, {\"status\": \"affected\", \"version\": \"1.0.28\"}, {\"status\": \"affected\", \"version\": \"1.0.29\"}, {\"status\": \"affected\", \"version\": \"1.0.30\"}, {\"status\": \"affected\", \"version\": \"1.0.31\"}, {\"status\": \"affected\", \"version\": \"1.0.32\"}, {\"status\": \"affected\", \"version\": \"1.0.33\"}, {\"status\": \"affected\", \"version\": \"1.0.34\"}, {\"status\": \"affected\", \"version\": \"1.0.35\"}, {\"status\": \"affected\", \"version\": \"1.0.36\"}, {\"status\": \"affected\", \"version\": \"1.0.37\"}, {\"status\": \"affected\", \"version\": \"1.0.38\"}, {\"status\": \"affected\", \"version\": \"1.0.39\"}, {\"status\": \"affected\", \"version\": \"1.0.40\"}, {\"status\": \"affected\", \"version\": \"1.0.41\"}, {\"status\": \"affected\", \"version\": \"1.0.42\"}, {\"status\": \"affected\", \"version\": \"1.0.43\"}, {\"status\": \"affected\", \"version\": \"1.0.44\"}, {\"status\": \"affected\", \"version\": \"1.0.45\"}, {\"status\": \"affected\", \"version\": \"1.0.46\"}, {\"status\": \"affected\", \"version\": \"1.0.47\"}, {\"status\": \"affected\", \"version\": \"1.0.48\"}, {\"status\": \"affected\", \"version\": \"1.0.49\"}, {\"status\": \"affected\", \"version\": \"1.0.50\"}, {\"status\": \"affected\", \"version\": \"1.0.51\"}, {\"status\": \"affected\", \"version\": \"1.0.52\"}, {\"status\": \"affected\", \"version\": \"1.0.53\"}, {\"status\": \"affected\", \"version\": \"1.0.54\"}, {\"status\": \"affected\", \"version\": \"1.0.55\"}, {\"status\": \"affected\", \"version\": \"1.0.56\"}, {\"status\": \"affected\", \"version\": \"1.0.57\"}, {\"status\": \"affected\", \"version\": \"1.0.58\"}, {\"status\": \"affected\", \"version\": \"1.0.59\"}, {\"status\": \"affected\", \"version\": \"1.0.60\"}, {\"status\": \"affected\", \"version\": \"1.0.61\"}, {\"status\": \"affected\", \"version\": \"1.0.62\"}, {\"status\": \"affected\", \"version\": \"1.0.63\"}, {\"status\": \"affected\", \"version\": \"1.0.64\"}, {\"status\": \"affected\", \"version\": \"1.0.65\"}, {\"status\": \"affected\", \"version\": \"1.0.66\"}, {\"status\": \"affected\", \"version\": \"1.0.67\"}, {\"status\": \"affected\", \"version\": \"1.0.68\"}, {\"status\": \"affected\", \"version\": \"1.0.69\"}, {\"status\": \"affected\", \"version\": \"1.0.70\"}, {\"status\": \"affected\", \"version\": \"1.0.71\"}, {\"status\": \"affected\", \"version\": \"1.0.72\"}, {\"status\": \"affected\", \"version\": \"1.0.73\"}, {\"status\": \"affected\", \"version\": \"1.0.74\"}, {\"status\": \"affected\", \"version\": \"1.0.75\"}, {\"status\": \"affected\", \"version\": \"1.0.76\"}, {\"status\": \"affected\", \"version\": \"1.0.77\"}, {\"status\": \"affected\", \"version\": \"1.0.78\"}, {\"status\": \"affected\", \"version\": \"1.0.79\"}, {\"status\": \"affected\", \"version\": \"1.0.80\"}, {\"status\": \"affected\", \"version\": \"1.0.81\"}, {\"status\": \"affected\", \"version\": \"1.0.82\"}, {\"status\": \"affected\", \"version\": \"1.0.83\"}, {\"status\": \"affected\", \"version\": \"1.0.84\"}]}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2026-02-05T00:00:00.000Z\", \"value\": \"Advisory disclosed\"}, {\"lang\": \"en\", \"time\": \"2026-02-05T01:00:00.000Z\", \"value\": \"VulDB entry created\"}, {\"lang\": \"en\", \"time\": \"2026-02-05T20:40:33.000Z\", \"value\": \"VulDB entry last update\"}], \"references\": [{\"url\": \"https://vuldb.com/?id.344598\", \"name\": \"VDB-344598 | happyfish100 libfastcommon base64.c base64_decode stack-based overflow\", \"tags\": [\"vdb-entry\", \"technical-description\"]}, {\"url\": \"https://vuldb.com/?ctiid.344598\", \"name\": \"VDB-344598 | CTI Indicators (IOB, IOC, IOA)\", \"tags\": [\"signature\", \"permissions-required\"]}, {\"url\": \"https://vuldb.com/?submit.743873\", \"name\": \"Submit #743873 | happyfish100 libfastcommon V1.0.84 and earlier Heap-based Buffer Overflow\", \"tags\": [\"third-party-advisory\"]}, {\"url\": \"https://github.com/happyfish100/libfastcommon/issues/55\", \"tags\": [\"issue-tracking\"]}, {\"url\": \"https://github.com/happyfish100/libfastcommon/issues/55#issuecomment-3776757848\", \"tags\": [\"issue-tracking\"]}, {\"url\": \"https://github.com/happyfish100/libfastcommon/issues/55#issue-3836362577\", \"tags\": [\"exploit\", \"issue-tracking\"]}, {\"url\": \"https://github.com/happyfish100/libfastcommon/commit/82f66af3e252e3e137dba0c3891570f085e79adf\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/happyfish100/libfastcommon/\", \"tags\": [\"product\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"A security vulnerability has been detected in happyfish100 libfastcommon up to 1.0.84. Affected by this vulnerability is the function base64_decode of the file src/base64.c. The manipulation leads to stack-based buffer overflow. Local access is required to approach this attack. The exploit has been disclosed publicly and may be used. The identifier of the patch is 82f66af3e252e3e137dba0c3891570f085e79adf. Applying a patch is the recommended action to fix this issue.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-121\", \"description\": \"Stack-based Buffer Overflow\"}]}, {\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-119\", \"description\": \"Memory Corruption\"}]}], \"providerMetadata\": {\"orgId\": \"1af790b2-7ee1-4545-860a-a788eba489b5\", \"shortName\": \"VulDB\", \"dateUpdated\": \"2026-02-06T11:02:08.107Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-2016\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-02-06T13:08:43.137Z\", \"dateReserved\": \"2026-02-05T19:35:28.683Z\", \"assignerOrgId\": \"1af790b2-7ee1-4545-860a-a788eba489b5\", \"datePublished\": \"2026-02-06T11:02:08.107Z\", \"assignerShortName\": \"VulDB\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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