diff --git a/ext/misc/fossildelta.c b/ext/misc/fossildelta.c
index 8765ffd040..269d9d84fb 100644
--- a/ext/misc/fossildelta.c
+++ b/ext/misc/fossildelta.c
@@ -567,7 +567,7 @@ static int delta_apply(
     return -1;
   }
   zDelta++; lenDelta--;
-  while( *zDelta && lenDelta>0 ){
+  while( lenDelta>0 && *zDelta ){
     unsigned int cnt, ofst;
     cnt = deltaGetInt(&zDelta, &lenDelta);
     if( lenDelta<=0 ) return -1;
diff --git a/ext/rbu/sqlite3rbu.c b/ext/rbu/sqlite3rbu.c
index 5521b8ec86..ee3d8df68c 100644
--- a/ext/rbu/sqlite3rbu.c
+++ b/ext/rbu/sqlite3rbu.c
@@ -616,7 +616,7 @@ static int rbuDeltaApply(
     return -1;
   }
   zDelta++; lenDelta--;
-  while( *zDelta && lenDelta>0 ){
+  while( lenDelta>0 && *zDelta ){
     unsigned int cnt, ofst;
     cnt = rbuDeltaGetInt(&zDelta, &lenDelta);
     if( lenDelta<=0 ) return -1;
diff --git a/manifest b/manifest
index 0ed6fe362b..38098ac268 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Fix\spossible\s1-byte\sOOB\sread\swhen\sdecoding\sa\smalformed\sFLOAT5\selement\nin\sJSONB.
-D 2026-07-04T08:52:54.700
+C Fix\spossible\sone-byte\sOOB\sread\sin\sthe\sfossildelta.c\sextension.
+D 2026-07-04T09:28:12.969
 F .fossil-settings/binary-glob 61195414528fb3ea9693577e1980230d78a1f8b0a54c78cf1b9b24d0a409ed6a x
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
@@ -377,7 +377,7 @@ F ext/misc/decimal.c 4168943bb0f605058167fc13a3219625f014cb9d30d9c1aed5ecf55e00a
 F ext/misc/eval.c 04bc9aada78c888394204b4ed996ab834b99726fb59603b0ee3ed6e049755dc1
 F ext/misc/explain.c 04c9270fd8cf93a9bceb12d2f5f67e3f09a4e58b3e0efe14d24531444d2fffdf
 F ext/misc/fileio.c e72033f987894ed821bf324a426ed462743399c274f1290dcb646349b6d7548f
-F ext/misc/fossildelta.c 356682c1df24806ed186ded6998a71ba4db4945b707a457f0b8e7e7674cb20c9
+F ext/misc/fossildelta.c eb6a6e11c4aff4a081bfe4d0069e2dc054e1f9005336b6b511c43faf406051ed
 F ext/misc/fuzzer.c 32cef9a29864a1bc1329ccb6dfa613f197bb83491a7612c2ca2c83ee26cd8f14
 F ext/misc/ieee754.c 2901d08a586d00a1d3c0fd89e03c57ee9e2b5f013b0daab9e49c7a48a9d5946b
 F ext/misc/memstat.c 03ab52d2d841eb3f55118105c1964d5225f152b23bd708844c648b48d14ccbcf
@@ -468,7 +468,7 @@ F ext/rbu/rbuvacuum.test 542561741ff2b262e3694bc6012b44694ee62c545845319a06f3237
 F ext/rbu/rbuvacuum2.test 1a9bd41f127be2826de2a65204df9118525a8af8d16e61e6bc63ba3ac0010a23
 F ext/rbu/rbuvacuum3.test 3ce42695fdf21aaa3499e857d7d4253bc499ad759bcd6c9362042c13cd37d8de
 F ext/rbu/rbuvacuum4.test ffccd22f67e2d0b380d2889685742159dfe0d19a3880ca3d2d1d69eefaebb205
-F ext/rbu/sqlite3rbu.c 9e10a245e34d1157754824c38b0b16f662a6a9a3449424536a9031152a2cdbe8
+F ext/rbu/sqlite3rbu.c d8c28bb8715718be354f4e283cc03533ba03c8f56e2dc39d9ba4d466428c3dcf
 F ext/rbu/sqlite3rbu.h e3a5bf21e09ca93ce4e8740e00d6a853e90a697968ec0ea98f40826938bdb68e
 F ext/rbu/test_rbu.c 8b6e64e486c28c41ef29f6f4ea6be7b3091958987812784904f5e903f6b56418
 F ext/recover/dbdata.c 10d3c56968a9af6853722a47280805ad1564714d79ea45ac6f7da14bb57fd137
@@ -2202,9 +2202,9 @@ F tool/warnings-clang.sh bbf6a1e685e534c92ec2bfba5b1745f34fb6f0bc2a362850723a9ee
 F tool/warnings.sh a554d13f6e5cf3760f041b87939e3d616ec6961859c3245e8ef701d1eafc2ca2
 F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
 F tool/winmain.c 00c8fb88e365c9017db14c73d3c78af62194d9644feaf60e220ab0f411f3604c
-P c87fc653b0bafb23063d38c9fcd059eaeedadcb7bb920a6121665850879146c5
-Q +6ed20ab693b298b6b645ee73801ee19952e9c188fba93594634325e12de02848
-R ddf743f5458a1d6c5ec25740f341b1d1
+P a43c78f9f6a4a83b9bffd519a1a5634086653c8ac94ead9752fef690a4e20e5a
+Q +8001a373d1c91f92639fb34fca18f9667f1ee92eb6bfa49df06b8cc256385292
+R 4e52adc6242aa3e4c4501059635c4469
 U drh
-Z 2b9555a39cf68d9fafdf718f5dc333c1
+Z 414e86f32efc4b0187d37ee24345e8b7
 # Remove this line to create a well-formed Fossil manifest.
diff --git a/manifest.uuid b/manifest.uuid
index 6eee0ff62c..bf0b1ca4b3 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-a43c78f9f6a4a83b9bffd519a1a5634086653c8ac94ead9752fef690a4e20e5a
+3d6c32fc0797d97196cc16f66aa00890b5c03e241a5632a0ab27cc46c33a19a3