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Analysis Run

dfad04a1-d0f8-4f4b-a793-edce0b1672ea

failed
Chain ID
1
Address
0x4fc16de11deac71e8b2db539d82d93be4b486892
Block Number
—
Created
Mon, Dec 29, 2025 4:20 AM
Review Summary

What survived the funnel

Open this run to answer one question: is this real attacker-relevant behavior with real impact, or just normal contract plumbing?

back to vulns open contract
Confirmed
0
Validated
0
Source
Verified
Review Backing
Not yet
Best current signal
Untrusted DELEGATECALL target reachable
crit 0 high 0 direct contract
Review Checklist
1. Read the findings table first. Ignore raw jobs until the result looks real.
2. Confirm attacker control, not just the existence of a sink.
3. Confirm money or privilege impact.
4. Keep it if the behavior is real. Kill it if this is normal proxy, admin, or upgrade plumbing.

Processing Jobs

Status & attempts
ID Type Status Attempts Heartbeat
30409 report.consolidate complete 1 / 1 3 months ago
93853 artifact.fetch failed 1 / 3 1 week ago
93854 tool.cast_disasm complete 1 / 3 1 week ago
93855 analysis.bundle complete 1 / 3 1 week ago
93856 capability.graph complete 1 / 3 1 week ago
93857 detector.run complete 1 / 3 1 week ago
93858 validation.fork complete 1 / 3 1 week ago

Artifact

Runtime bytecode: available
Creation TX: —
Deployer: —
Proxy: no
Implementation:
—
Verified Source: yes

Slither

tool.slither

No slither job recorded yet.

Codex

report.consolidate
Job Status
complete
Attempts
1 / 1
Findings
0
No findings?
yes
Summary
Reviewed `contracts/@celo-org/optics-sol/contracts/upgrade/UpgradeBeaconProxy.sol` (first-party). No exploitable vulnerabilities identified in scope.
View stderr 
[codex:612556] OpenAI Codex v0.77.0 (research preview)
[codex:612556] --------
[codex:612556] workdir: /tmp/codex-multi-gnble3ly
[codex:612556] model: gpt-5.2-codex
[codex:612556] provider: openai
[codex:612556] approval: never
[codex:612556] sandbox: read-only
[codex:612556] reasoning effort: xhigh
[codex:612556] reasoning summaries: auto
[codex:612556] session id: 019b6855-eb21-7b72-8ba2-5c8879314fc9
[codex:612556] --------
[codex:612556] user
[codex:612556] You are a security auditor. Audit this Solidity codebase for exploitable vulnerabilities.
[codex:612556] Focus on: reentrancy, access control, upgradeability/proxy issues, signature validation, oracle manipulation,
[codex:612556] accounting/invariant breaks, external call patterns, unchecked return values, and dangerous delegatecall.
[codex:612556] 
[codex:612556] Scope rules:
[codex:612556] - You MUST fully read `AUDIT_BUNDLE.txt` before concluding. It contains the complete contents of all first-party `contracts/**/*.sol` files.
[codex:612556] - Treat `lib/` and `@openzeppelin/` as third-party dependencies; skip them unless there is a concrete misuse angle in first-party code.
[codex:612556] 
[codex:612556] Output MUST be valid JSON matching the provided schema.
[codex:612556] - If you find nothing meaningful: set no_findings=true and findings=[].
[codex:612556] - Otherwise: set no_findings=false and include findings with severity/category/title and file/line locations when possible.
[codex:612556] 
[codex:612556] Output constraints (IMPORTANT):
[codex:612556] - severity MUST be exactly one of: info, low, medium, high, critical (lowercase).
[codex:612556] - category MUST be exactly one of: access_control, reentrancy, math, oracle, upgradeability, auth, other.
[codex:612556] mcp startup: no servers
[codex:612556] 
[codex:612556] thinking
[codex:612556] **Preparing to audit bundle**
[codex:612556] exec
[codex:612556] /bin/bash -lc ls in /tmp/codex-multi-gnble3ly succeeded in 5ms:
[codex:612556] AUDIT_BUNDLE.txt
[codex:612556] codex-output-schema.json
[codex:612556] contracts
[codex:612556] 
[codex:612556] thinking
[codex:612556] **Reading AUDIT_BUNDLE.txt file**
[codex:612556] exec
[codex:612556] /bin/bash -lc 'cat AUDIT_BUNDLE.txt' in /tmp/codex-multi-gnble3ly succeeded in 5ms:
[codex:612556] This file concatenates the full contents of first-party Solidity sources for auditing.
[codex:612556] 
[codex:612556] ================================================================================
[codex:612556] FILE: contracts/@celo-org/optics-sol/contracts/upgrade/UpgradeBeaconProxy.sol
[codex:612556] ================================================================================
[codex:612556] // SPDX-License-Identifier: MIT
[codex:612556] pragma solidity >=0.6.11;
[codex:612556] 
[codex:612556] // ============ External Imports ============
[codex:612556] import {Address} from "@openzeppelin/contracts/utils/Address.sol";
[codex:612556] 
[codex:612556] /**
[codex:612556]  * @title UpgradeBeaconProxy
[codex:612556]  * @notice
[codex:612556]  * Proxy contract which delegates all logic, including initialization,
[codex:612556]  * to an implementation contract.
[codex:612556]  * The implementation contract is stored within an Upgrade Beacon contract;
[codex:612556]  * the implementation contract can be changed by performing an upgrade on the Upgrade Beacon contract.
[codex:612556]  * The Upgrade Beacon contract for this Proxy is immutably specified at deployment.
[codex:612556]  * @dev This implementation combines the gas savings of keeping the UpgradeBeacon address outside of contract storage
[codex:612556] 
[codex:612556] thinking
[codex:612556] **Analyzing UpgradeBeaconProxy risks and design**
[codex:612556] 
[codex:612556] I’m carefully examining UpgradeBeaconProxy for vulnerabilities like delegatecall misuse, upgradeability risks, and initialization concerns. The proxy relies on an immutable upgrade beacon address to fetch implementations but doesn’t verify each returned address is a contract, which might cause calls to succeed without executing code if the beacon returns a non-contract. While this could brick the proxy, it likely isn’t exploitable by attackers since beacon control is assumed trusted. Overall, no clear vulnerabilities appear in scope—just some configuration and governance risks typical for this proxy pattern. I’ll produce a JSON summary reflecting these findings.
[codex:612556] codex
[codex:612556] {"no_findings":true,"summary":"Reviewed `contracts/@celo-org/optics-sol/contracts/upgrade/UpgradeBeaconProxy.sol` (first-party). No exploitable vulnerabilities identified in scope.","findings":[]}
[codex:612556] tokens used
[codex:612556] 9,303
[codex:612556] {"no_findings":true,"summary":"Reviewed `contracts/@celo-org/optics-sol/contracts/upgrade/UpgradeBeaconProxy.sol` (first-party). No exploitable vulnerabilities identified in scope.","findings":[]}
Metadata 
{
    "codex": {
        "ran_at": "2025-12-29T04:20:50.122969+00:00",
        "returncode": 0
    },
    "summary": "Reviewed `contracts/@celo-org/optics-sol/contracts/upgrade/UpgradeBeaconProxy.sol` (first-party). No exploitable vulnerabilities identified in scope.",
    "raw_final": {
        "summary": "Reviewed `contracts/@celo-org/optics-sol/contracts/upgrade/UpgradeBeaconProxy.sol` (first-party). No exploitable vulnerabilities identified in scope.",
        "findings": [],
        "no_findings": true
    },
    "no_findings": true,
    "schema_version": 1
}

Opcode Heuristics

tool.cast_disasm
Delegatecall
1
Selfdestruct
0
CREATE2
0
CALL-family (heavy)
1
EXT*/BALANCE
2
Total opcodes
299
Flags
delegatecall_present
View cast disassembly output 
00000000: PUSH1 0x80
00000002: PUSH1 0x40
00000004: MSTORE
00000005: CALLDATASIZE
00000006: PUSH2 0x0013
00000009: JUMPI
0000000a: PUSH2 0x0011
0000000d: PUSH2 0x0017
00000010: JUMP
00000011: JUMPDEST
00000012: STOP
00000013: JUMPDEST
00000014: PUSH2 0x0011
00000017: JUMPDEST
00000018: PUSH2 0x0027
0000001b: PUSH2 0x0022
0000001e: PUSH2 0x002f
00000021: JUMP
00000022: JUMPDEST
00000023: PUSH2 0x005f
00000026: JUMP
00000027: JUMPDEST
00000028: JUMP
00000029: JUMPDEST
0000002a: EXTCODESIZE
0000002b: ISZERO
0000002c: ISZERO
0000002d: SWAP1
0000002e: JUMP
0000002f: JUMPDEST
00000030: PUSH1 0x00
00000032: PUSH2 0x005a
00000035: PUSH32 0x000000000000000000000000b6bb41b1fb8c381b002c405b8abb5d1de0c0abfe
00000056: PUSH2 0x0083
00000059: JUMP
0000005a: JUMPDEST
0000005b: SWAP1
0000005c: POP
0000005d: SWAP1
0000005e: JUMP
0000005f: JUMPDEST
00000060: CALLDATASIZE
00000061: PUSH1 0x00
00000063: DUP1
00000064: CALLDATACOPY
00000065: PUSH1 0x00
00000067: DUP1
00000068: CALLDATASIZE
00000069: PUSH1 0x00
0000006b: DUP5
0000006c: GAS
0000006d: DELEGATECALL
0000006e: RETURNDATASIZE
0000006f: PUSH1 0x00
00000071: DUP1
00000072: RETURNDATACOPY
00000073: DUP1
00000074: DUP1
00000075: ISZERO
00000076: PUSH2 0x007e
00000079: JUMPI
0000007a: RETURNDATASIZE
0000007b: PUSH1 0x00
0000007d: RETURN
0000007e: JUMPDEST
0000007f: RETURNDATASIZE
00000080: PUSH1 0x00
00000082: REVERT
00000083: JUMPDEST
00000084: PUSH1 0x40
00000086: MLOAD
00000087: PUSH1 0x00
00000089: SWAP1
0000008a: DUP2
0000008b: SWAP1
0000008c: DUP2
0000008d: SWAP1
0000008e: PUSH20 0xffffffffffffffffffffffffffffffffffffffff
000000a3: DUP6
000000a4: AND
000000a5: SWAP1
000000a6: DUP3
000000a7: DUP2
000000a8: DUP2
000000a9: DUP2
000000aa: DUP6
000000ab: GAS
000000ac: STATICCALL
000000ad: SWAP2
000000ae: POP
000000af: POP
000000b0: RETURNDATASIZE
000000b1: DUP1
000000b2: PUSH1 0x00
000000b4: DUP2
000000b5: EQ
000000b6: PUSH2 0x00db
000000b9: JUMPI
000000ba: PUSH1 0x40
000000bc: MLOAD
000000bd: SWAP2
000000be: POP
000000bf: PUSH1 0x1f
000000c1: NOT
000000c2: PUSH1 0x3f
000000c4: RETURNDATASIZE
000000c5: ADD
000000c6: AND
000000c7: DUP3
000000c8: ADD
000000c9: PUSH1 0x40
000000cb: MSTORE
000000cc: RETURNDATASIZE
000000cd: DUP3
000000ce: MSTORE
000000cf: RETURNDATASIZE
000000d0: PUSH1 0x00
000000d2: PUSH1 0x20
000000d4: DUP5
000000d5: ADD
000000d6: RETURNDATACOPY
000000d7: PUSH2 0x00e0
000000da: JUMP
000000db: JUMPDEST
000000dc: PUSH1 0x60
000000de: SWAP2
000000df: POP
000000e0: JUMPDEST
000000e1: POP
000000e2: SWAP2
000000e3: POP
000000e4: SWAP2
000000e5: POP
000000e6: DUP2
000000e7: DUP2
000000e8: SWAP1
000000e9: PUSH2 0x018a
000000ec: JUMPI
000000ed: PUSH1 0x40
000000ef: MLOAD
000000f0: PUSH32 0x08c379a000000000000000000000000000000000000000000000000000000000
00000111: DUP2
00000112: MSTORE
00000113: PUSH1 0x04
00000115: ADD
00000116: DUP1
00000117: DUP1
00000118: PUSH1 0x20
0000011a: ADD
0000011b: DUP3
0000011c: DUP2
0000011d: SUB
0000011e: DUP3
0000011f: MSTORE
00000120: DUP4
00000121: DUP2
00000122: DUP2
00000123: MLOAD
00000124: DUP2
00000125: MSTORE
00000126: PUSH1 0x20
00000128: ADD
00000129: SWAP2
0000012a: POP
0000012b: DUP1
0000012c: MLOAD
0000012d: SWAP1
0000012e: PUSH1 0x20
00000130: ADD
00000131: SWAP1
00000132: DUP1
00000133: DUP4
00000134: DUP4
00000135: PUSH1 0x00
00000137: JUMPDEST
00000138: DUP4
00000139: DUP2
0000013a: LT
0000013b: ISZERO
0000013c: PUSH2 0x014f
0000013f: JUMPI
00000140: DUP2
00000141: DUP2
00000142: ADD
00000143: MLOAD
00000144: DUP4
00000145: DUP3
00000146: ADD
00000147: MSTORE
00000148: PUSH1 0x20
0000014a: ADD
0000014b: PUSH2 0x0137
0000014e: JUMP
0000014f: JUMPDEST
00000150: POP
00000151: POP
00000152: POP
00000153: POP
00000154: SWAP1
00000155: POP
00000156: SWAP1
00000157: DUP2
00000158: ADD
00000159: SWAP1
0000015a: PUSH1 0x1f
0000015c: AND
0000015d: DUP1
0000015e: ISZERO
0000015f: PUSH2 0x017c
00000162: JUMPI
00000163: DUP1
00000164: DUP3
00000165: SUB
00000166: DUP1
00000167: MLOAD
00000168: PUSH1 0x01
0000016a: DUP4
0000016b: PUSH1 0x20
0000016d: SUB
0000016e: PUSH2 0x0100
00000171: EXP
00000172: SUB
00000173: NOT
00000174: AND
00000175: DUP2
00000176: MSTORE
00000177: PUSH1 0x20
00000179: ADD
0000017a: SWAP2
0000017b: POP
0000017c: JUMPDEST
0000017d: POP
0000017e: SWAP3
0000017f: POP
00000180: POP
00000181: POP
00000182: PUSH1 0x40
00000184: MLOAD
00000185: DUP1
00000186: SWAP2
00000187: SUB
00000188: SWAP1
00000189: REVERT
0000018a: JUMPDEST
0000018b: POP
0000018c: DUP1
0000018d: DUP1
0000018e: PUSH1 0x20
00000190: ADD
00000191: SWAP1
00000192: MLOAD
00000193: PUSH1 0x20
00000195: DUP2
00000196: LT
00000197: ISZERO
00000198: PUSH2 0x01a0
0000019b: JUMPI
0000019c: PUSH1 0x00
0000019e: DUP1
0000019f: REVERT
000001a0: JUMPDEST
000001a1: POP
000001a2: MLOAD
000001a3: SWAP5
000001a4: SWAP4
000001a5: POP
000001a6: POP
000001a7: POP
000001a8: POP
000001a9: JUMP
000001aa: INVALID
000001ab: LOG2
000001ac: PUSH5 0x6970667358
000001b2: UNKNOWN(0x22)
000001b3: SLT
000001b4: KECCAK256
000001b5: GASLIMIT
000001b6: UNKNOWN(0xE2)
000001b7: SWAP8
000001b8: DUP15
000001b9: UNKNOWN(0xB5)
000001ba: SLT
000001bb: UNKNOWN(0xEE)
000001bc: CALLER
000001bd: PUSH15 0xa17d3aebe82e86ec3eccf27a023a07
000001cd: UNKNOWN(0xF6)
000001ce: UNKNOWN(0xC2)
000001cf: UNKNOWN(0x4B)
000001d0: UNKNOWN(0xD7)
000001d1: UNKNOWN(0xE9)
000001d2: UNKNOWN(0xB5)
000001d3: EXTCODECOPY
000001d4: DUP15
000001d5: PUSH5 0x736f6c6343
000001db: STOP
000001dc: SMOD
000001dd: MOD
000001de: STOP
000001df: CALLER

Findings

validated = confirmed for call sinks; sink observed for others
Severity Category Tool Title Confidence Validated Confirmed Details
critical upgradeability detector Untrusted DELEGATECALL target reachable 70 no no
view
trace_id: 0xb1b7b355c665216ffc5b07668ae593bae1d21a2d4d3ed30475c7c421d31a5486
call_targets: 0x688a54c4b1c5b917154ea2f61b8a4a4cbdff4738
target_varies: no
classification: constant_target
validation_json 
{
    "sink": "DELEGATECALL",
    "errors": 0,
    "status": "sink_reached",
    "attempts": 1,
    "trace_id": "0xb1b7b355c665216ffc5b07668ae593bae1d21a2d4d3ed30475c7c421d31a5486",
    "confirmed": false,
    "trace_mode": "callTracer",
    "call_targets": [
        "0x688a54c4b1c5b917154ea2f61b8a4a4cbdff4738"
    ],
    "matched_probe": null,
    "target_varies": false,
    "classification": "constant_target"
}
witness_json 
{
    "notes": "heuristic witness; entrypoints are best-effort selectors with zeroed calldata",
    "constraints": [],
    "entrypoints": [
        {
            "calldata": "0x",
            "selector": "fallback",
            "calldata_variants": [
                "0x"
            ]
        }
    ]
}
evidence_json 
{
    "examples": [
        {
            "pc": 109,
            "opcode": "DELEGATECALL",
            "returndata_checked": null,
            "value_expression_category": "n/a",
            "target_expression_category": "computed"
        }
    ],
    "guards_detected": [],
    "delegatecall_count": 1,
    "untrusted_delegatecall_count": 1
}
medium upgradeability cast DELEGATECALL present 80 no —
view
evidence_json 
{
    "notes": "delegatecall enables execution in caller context; common in proxies/upgradeable patterns",
    "delegatecall_count": 1
}