[8.0] Don't apply saferEval default length cap to workflow XML values#8629
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fstagni
previously approved these changes
Jun 18, 2026
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Please consider adding also #8635 |
Commit bf6858d replaced eval() with saferEval() in WorkflowReader to avoid evaluating arbitrary code. saferEval enforces a 2048-byte cap, but non-string workflow parameters (lists/dicts serialised as repr()) are KB-scale and routinely exceed it, so parsing legitimate workflows failed with "Object string is too long (>2048 bytes)". Pass a generous finite cap (1 MiB) at this call site instead of the 2048 default. literal_eval still prevents code execution regardless of content; the ceiling remains as defence-in-depth against pathological/malicious input, bounding literal_eval's object-allocation blow-up. Legitimate workflow values never approach it. SaferEval's default is left unchanged for its other callers.
Commit bf6858d replaced eval() with saferEval() in Workflow/Utility.substitute to avoid evaluating arbitrary code. saferEval enforces a 2048-byte cap, but non-string workflow parameters (lists/dicts) are KB-scale and routinely exceed it, so substituting variables into a large parameter failed with "Object string is too long (>2048 bytes)". Pass a generous finite cap (1 MiB) at this call site instead of the 2048 default, matching the fix in WorkflowReader. literal_eval still prevents code execution regardless of content; the ceiling remains as defence-in-depth against pathological/malicious input. SaferEval's default is unchanged for its other callers.
sfayer
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fstagni
approved these changes
Jun 22, 2026
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v8 backport of #8628.
BEGINRELEASENOTES
*Workflow
FIX: increased saferEval limit to 1 MiB for Workflow XML handling
ENDRELEASENOTES